CVE-2017-7805

CVSS V2 Medium 5 CVSS V3 High 7.5
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.
Overview
  • CVE ID
  • CVE-2017-7805
  • Assigner
  • security@mozilla.org
  • Vulnerability Status
  • Modified
  • Published Version
  • 2018-06-11T21:29:10
  • Last Modified Date
  • 2018-10-17T01:30:58
Weakness Enumerations
CWE URL
CWE-416 http://cwe.mitre.org/data/definitions/416.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:mozilla:firefox:56.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:mozilla:firefox_esr:52.4.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:mozilla:thunderbird:52.4.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://www.mozilla.org/security/advisories/mfsa2017-23/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-22/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-21/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1377618 Issue Tracking Vendor Advisory
https://www.debian.org/security/2017/dsa-4014 Third Party Advisory
https://www.debian.org/security/2017/dsa-3998 Third Party Advisory
https://www.debian.org/security/2017/dsa-3987 Third Party Advisory
https://security.gentoo.org/glsa/201803-14 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2832 Third Party Advisory
http://www.securitytracker.com/id/1039465 Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/101059 Third Party Advisory VDB Entry
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2017-7805
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7805
History
Created Old Value New Value Data Type Notes
2022-05-10 18:14:28 Added to TrackCVE
2022-12-03 07:48:44 2018-06-11T21:29Z 2018-06-11T21:29:10 CVE Published Date updated
2022-12-03 07:48:44 2018-10-17T01:30:58 CVE Modified Date updated
2022-12-03 07:48:44 Modified Vulnerability Status updated