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Mozilla » Firefox Esr : Security Vulnerabilities Published In 2020

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# CVE ID CWE ID # of Exploits Vulnerability Type(s) Publish Date Update Date Score Gained Access Level Access Complexity Authentication Conf. Integ. Avail.
1 CVE-2020-26968 787 Mem. Corr. 2020-12-09 2020-12-10
9.3
None Remote Medium Not required Complete Complete Complete
Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
2 CVE-2020-26965 212 2020-12-09 2020-12-10
4.3
None Remote Medium Not required Partial None None
Some websites have a feature "Show Password" where clicking a button will change a password field into a textbook field, revealing the typed password. If, when using a software keyboard that remembers user input, a user typed their password and used that feature, the type of the password field was changed, resulting in a keyboard layout change and the possibility for the software keyboard to remember the typed password. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
3 CVE-2020-26961 2020-12-09 2020-12-10
4.3
None Remote Medium Not required None Partial None
When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the responses as these do not make sense coming from a DoH resolver. However when an IPv4 address was mapped through IPv6, these addresses were erroneously let through, leading to a potential DNS Rebinding attack. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
4 CVE-2020-26960 416 2020-12-09 2020-12-10
9.3
None Remote Medium Not required Complete Complete Complete
If the Compact() method was called on an nsTArray, the array could have been reallocated without updating other pointers, leading to a potential use-after-free and exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
5 CVE-2020-26959 416 Mem. Corr. 2020-12-09 2020-12-10
6.8
None Remote Medium Not required Partial Partial Partial
During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
6 CVE-2020-26958 79 XSS Bypass 2020-12-09 2020-12-10
4.3
None Remote Medium Not required None Partial None
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
7 CVE-2020-26956 79 XSS 2020-12-09 2020-12-10
4.3
None Remote Medium Not required None Partial None
In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
8 CVE-2020-26953 1021 2020-12-09 2020-12-10
4.3
None Remote Medium Not required None Partial None
It was possible to cause the browser to enter fullscreen mode without displaying the security UI; thus making it possible to attempt a phishing attack or otherwise confuse the user. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
9 CVE-2020-26951 79 XSS Bypass 2020-12-09 2020-12-09
4.3
None Remote Medium Not required None Partial None
A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
10 CVE-2020-26950 416 2020-12-09 2020-12-09
9.3
None Remote Medium Not required Complete Complete Complete
In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.
11 CVE-2020-15683 Mem. Corr. 2020-10-22 2020-11-02
7.5
None Remote Low Not required Partial Partial Partial
Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.4, Firefox < 82, and Thunderbird < 78.4.
12 CVE-2020-15678 416 2020-10-01 2020-11-02
6.8
None Remote Medium Not required Partial Partial Partial
When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
13 CVE-2020-15677 601 2020-10-01 2020-11-02
5.8
None Remote Medium Not required Partial Partial None
By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original site (the one suffering from the open redirect) rather than the site the file was actually downloaded from. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
14 CVE-2020-15676 79 XSS 2020-10-01 2020-11-02
4.3
None Remote Medium Not required None Partial None
Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
15 CVE-2020-15673 763 Mem. Corr. 2020-10-01 2020-11-02
6.8
None Remote Medium Not required Partial Partial Partial
Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
16 CVE-2020-15670 763 Mem. Corr. 2020-10-01 2020-10-02
6.8
None Remote Medium Not required Partial Partial Partial
Mozilla developers reported memory safety bugs present in Firefox for Android 79. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 80, Firefox ESR < 78.2, Thunderbird < 78.2, and Firefox for Android < 80.
17 CVE-2020-15669 416 2020-10-01 2020-10-02
6.8
None Remote Medium Not required Partial Partial Partial
When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.
18 CVE-2020-15664 863 2020-10-01 2020-10-13
4.3
None Remote Medium Not required None Partial None
By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, Firefox ESR < 78.2, and Firefox for Android < 80.
19 CVE-2020-15663 269 Exec Code 2020-10-01 2020-10-13
9.3
None Remote Medium Not required Complete Complete Complete
If Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. Although the Mozilla Maintenance Service does ensure that updater.exe is signed by Mozilla, the version could have been rolled back to a previous version which would have allowed exploitation of an older bug and arbitrary code execution with System Privileges. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, and Firefox ESR < 78.2.
20 CVE-2020-15659 787 Mem. Corr. 2020-08-10 2020-08-21
9.3
None Remote Medium Not required Complete Complete Complete
Mozilla developers and community members reported memory safety bugs present in Firefox 78 and Firefox ESR 78.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, and Thunderbird < 78.1.
21 CVE-2020-15658 754 2020-08-10 2020-08-18
4.3
None Remote Medium Not required None Partial None
The code for downloading files did not properly take care of special characters, which led to an attacker being able to cut off the file ending at an earlier position, leading to a different file type being downloaded than shown in the dialog. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
22 CVE-2020-15656 843 2020-08-10 2020-08-18
9.3
None Remote Medium Not required Complete Complete Complete
JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
23 CVE-2020-15655 200 Bypass +Info 2020-08-10 2020-08-18
4.3
None Remote Medium Not required Partial None None
A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
24 CVE-2020-15654 835 2020-08-10 2020-08-18
4.3
None Remote Medium Not required None Partial None
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
25 CVE-2020-15653 Bypass 2020-08-10 2020-08-18
4.3
None Remote Medium Not required None Partial None
An iframe sandbox element with the allow-popups flag could be bypassed when using noopener links. This could have led to security issues for websites relying on sandbox configurations that allowed popups and hosted arbitrary content. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
26 CVE-2020-15652 346 2020-08-10 2020-08-18
4.3
None Remote Medium Not required Partial None None
By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to content that can be parsed as script. This vulnerability affects Firefox < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, and Thunderbird < 78.1.
27 CVE-2020-12421 295 2020-07-09 2020-07-27
4.3
None Remote Medium Not required None Partial None
When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date silently without notification to the user. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
28 CVE-2020-12420 416 Mem. Corr. 2020-07-09 2020-07-27
9.3
None Remote Medium Not required Complete Complete Complete
When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
29 CVE-2020-12419 416 Mem. Corr. 2020-07-09 2020-07-27
9.3
None Remote Medium Not required Complete Complete Complete
When processing callbacks that occurred during window flushing in the parent process, the associated window may die; causing a use-after-free condition. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
30 CVE-2020-12418 125 2020-07-09 2020-07-27
4.3
None Remote Medium Not required Partial None None
Manipulating individual parts of a URL object could have caused an out-of-bounds read, leaking process memory to malicious JavaScript. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
31 CVE-2020-12417 119 Overflow Mem. Corr. 2020-07-09 2020-07-27
9.3
None Remote Medium Not required Complete Complete Complete
Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. *Note: this issue only affects Firefox on ARM64 platforms.* This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
32 CVE-2020-12410 119 Overflow Mem. Corr. 2020-07-09 2020-07-22
9.3
None Remote Medium Not required Complete Complete Complete
Mozilla developers reported memory safety bugs present in Firefox 76 and Firefox ESR 68.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
33 CVE-2020-12406 345 2020-07-09 2020-07-22
9.3
None Remote Medium Not required Complete Complete Complete
Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
34 CVE-2020-12405 416 2020-07-09 2020-07-22
2.6
None Remote High Not required None None Partial
When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to a potentially exploitable crash. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
35 CVE-2020-12399 203 2020-07-09 2020-09-30
1.2
None Local High Not required Partial None None
NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
36 CVE-2020-12395 119 Overflow Mem. Corr. 2020-05-26 2020-06-12
10.0
None Remote Low Not required Complete Complete Complete
Mozilla developers and community members reported memory safety bugs present in Firefox 75 and Firefox ESR 68.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
37 CVE-2020-12392 200 +Info 2020-05-26 2020-06-12
2.1
None Local Low Not required Partial None None
The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in the disclosure of local files. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
38 CVE-2020-12387 362 2020-05-26 2020-06-12
6.8
None Remote Medium Not required Partial Partial Partial
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
39 CVE-2020-6831 120 Overflow Mem. Corr. 2020-05-26 2020-07-23
7.5
None Remote Low Not required Partial Partial Partial
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
40 CVE-2020-6825 119 Overflow Mem. Corr. 2020-04-24 2020-05-01
7.5
None Remote Low Not required Partial Partial Partial
Mozilla developers and community members Tyson Smith and Christian Holler reported memory safety bugs present in Firefox 74 and Firefox ESR 68.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
41 CVE-2020-6822 787 2020-04-24 2020-05-01
6.8
None Remote Medium Not required Partial Partial Partial
On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>. It is possible that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
42 CVE-2020-6821 119 Overflow 2020-04-24 2020-05-01
5.0
None Remote Low Not required Partial None None
When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
43 CVE-2020-6820 415 2020-04-24 2020-05-01
6.8
None Remote Medium Not required Partial Partial Partial
Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.
44 CVE-2020-6819 416 2020-04-24 2020-05-01
6.8
None Remote Medium Not required Partial Partial Partial
Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.
45 CVE-2020-6814 119 Overflow Mem. Corr. 2020-03-25 2020-04-22
7.5
None Remote Low Not required Partial Partial Partial
Mozilla developers reported memory safety bugs present in Firefox and Thunderbird 68.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
46 CVE-2020-6812 200 +Info 2020-03-25 2020-04-22
5.0
None Remote Low Not required Partial None None
The first time AirPods are connected to an iPhone, they become named after the user's name by default (e.g. Jane Doe's AirPods.) Websites with camera or microphone permission are able to enumerate device names, disclosing the user's name. To resolve this issue, Firefox added a special case that renames devices containing the substring 'AirPods' to simply 'AirPods'. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
47 CVE-2020-6811 74 Exec Code 2020-03-25 2020-04-22
6.8
None Remote Medium Not required Partial Partial Partial
The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the website. If a user used the 'Copy as Curl' feature and pasted the command into a terminal, it could have resulted in command injection and arbitrary command execution. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
48 CVE-2020-6807 416 Exec Code 2020-03-25 2020-04-22
6.8
None Remote Medium Not required Partial Partial Partial
When a device was changed while a stream was about to be destroyed, the <code>stream-reinit</code> task may have been executed after the stream was destroyed, causing a use-after-free and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
49 CVE-2020-6806 125 Mem. Corr. 2020-03-25 2020-04-22
6.8
None Remote Medium Not required Partial Partial Partial
By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
50 CVE-2020-6805 416 2020-03-25 2020-04-22
6.8
None Remote Medium Not required Partial Partial Partial
When removing data about an origin whose tab was recently closed, a use-after-free could occur in the Quota manager, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
Total number of vulnerabilities : 74   Page : 1 (This Page)2
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