Vulnerability Details : CVE-2017-7793
A use-after-free vulnerability can occur in the Fetch API when the worker or the associated window are freed when still in use, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
Vulnerability category: Memory Corruption
Products affected by CVE-2017-7793
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-7793
0.42%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 74 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-7793
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2017-7793
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-7793
-
https://www.mozilla.org/security/advisories/mfsa2017-23/
Security vulnerabilities fixed in Thunderbird 52.4 — MozillaVendor Advisory
-
https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html
[SECURITY] [DLA 1153-1] icedove/thunderbird security updateThird Party Advisory
-
http://www.securitytracker.com/id/1039465
Mozilla Firefox Multiple Bugs Let Remote Users Spoof URLs, Conduct Cross-Site Scripting Attacks, Obtain Potentially Sensitive Information, and Execute Arbitrary Code - SecurityTrackerThird Party Advisory;VDB Entry
-
https://www.mozilla.org/security/advisories/mfsa2017-21/
Security vulnerabilities fixed in Firefox 56 — MozillaVendor Advisory
-
https://access.redhat.com/errata/RHSA-2017:2831
RHSA-2017:2831 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
http://www.securityfocus.com/bid/101055
Mozilla Firefox and Firefox ESR Multiple Use After Free Denial of Service VulnerabilitiesThird Party Advisory;VDB Entry
-
https://security.gentoo.org/glsa/201803-14
Mozilla Thunderbird: Multiple vulnerabilities (GLSA 201803-14) — Gentoo securityThird Party Advisory
-
https://www.debian.org/security/2017/dsa-4014
Debian -- Security Information -- DSA-4014-1 thunderbirdThird Party Advisory
-
https://www.mozilla.org/security/advisories/mfsa2017-22/
Security vulnerabilities fixed in Firefox ESR 52.4 — MozillaVendor Advisory
-
https://www.debian.org/security/2017/dsa-3987
Debian -- Security Information -- DSA-3987-1 firefox-esrThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2017:2885
RHSA-2017:2885 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1371889
1371889 - (CVE-2017-7793) Heap-use-after-free in mozilla::dom::(anonymous namespace)::ConsumeBodyDoneObserver<mozilla::dom::Request>::OnStreamCompleteIssue Tracking;Patch;Vendor Advisory
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