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Vulnerability Details : CVE-2017-7805

During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
Publish Date : 2018-06-11 Last Update Date : 2018-10-16
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 416

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2017:2832: nss security update (Important) oval:com.redhat.rhsa:def:20172832 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2017-7805

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 7.0 Version Details Vulnerabilities
2 OS Debian Debian Linux 8.0 Version Details Vulnerabilities
3 OS Debian Debian Linux 9.0 Version Details Vulnerabilities
4 Application Mozilla Firefox 56.0 Version Details Vulnerabilities
5 Application Mozilla Firefox Esr 52.4.0 Version Details Vulnerabilities
6 Application Mozilla Thunderbird 52.4.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 3
Mozilla Firefox 1
Mozilla Firefox Esr 1
Mozilla Thunderbird 1

- References For CVE-2017-7805

https://www.mozilla.org/security/advisories/mfsa2017-22/ CONFIRM
http://www.securityfocus.com/bid/101059
BID 101059 Mozilla Firefox and Firefox ESR Multiple Security Vulnerabilities Release Date:2019-02-01
http://www.securitytracker.com/id/1039465
SECTRACK 1039465
https://www.mozilla.org/security/advisories/mfsa2017-21/ CONFIRM
https://www.debian.org/security/2017/dsa-4014
DEBIAN DSA-4014
https://security.gentoo.org/glsa/201803-14
GENTOO GLSA-201803-14
https://www.debian.org/security/2017/dsa-3987
DEBIAN DSA-3987
https://bugzilla.mozilla.org/show_bug.cgi?id=1377618 CONFIRM
https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html
MLIST [debian-lts-announce] 20171101 [SECURITY] [DLA 1153-1] icedove/thunderbird security update
https://access.redhat.com/errata/RHSA-2017:2832
REDHAT RHSA-2017:2832
https://www.mozilla.org/security/advisories/mfsa2017-23/ CONFIRM
https://www.debian.org/security/2017/dsa-3998
DEBIAN DSA-3998
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html CONFIRM

- Metasploit Modules Related To CVE-2017-7805

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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