CVE-2017-7805 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/101059 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1039465 Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2017:2832 Third Party Advisory 
https://bugzilla.mozilla.org/show_bug.cgi?id=1377618 Issue Tracking  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html Third Party Advisory 
https://security.gentoo.org/glsa/201803-14 Third Party Advisory 
https://www.debian.org/security/2017/dsa-3987 Third Party Advisory 
https://www.debian.org/security/2017/dsa-3998 Third Party Advisory 
https://www.debian.org/security/2017/dsa-4014 Third Party Advisory 
https://www.mozilla.org/security/advisories/mfsa2017-21/ Vendor Advisory 
https://www.mozilla.org/security/advisories/mfsa2017-22/ Vendor Advisory 
https://www.mozilla.org/security/advisories/mfsa2017-23/ Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-7805
NVD Published Date:
06/11/2018
NVD Last Modified:
10/16/2018
Source:
MITRE