CVE-2017-7805

Summary

CVECVE-2017-7805
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-06-11 21:29:00 UTC
Updated2018-10-17 01:30:00 UTC
DescriptionDuring 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.

Risk And Classification

Problem Types: CWE-416

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 7.0 All All All
Operating System Debian Debian Linux 8.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Debian Debian Linux 7.0 All All All
Operating System Debian Debian Linux 8.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Application Mozilla Firefox 56.0 All All All
Application Mozilla Firefox 56.0 All All All
Application Mozilla Firefox Esr 52.4.0 All All All
Application Mozilla Firefox Esr 52.4.0 All All All
Application Mozilla Thunderbird 52.4.0 All All All
Application Mozilla Thunderbird 52.4.0 All All All

References

ReferenceSourceLinkTags
Mozilla Firefox Multiple Bugs Let Remote Users Spoof URLs, Conduct Cross-Site Scripting Attacks, Obtain Potentially Sensitive Information, and Execute Arbitrary Code - SecurityTracker SECTRACK www.securitytracker.com Third Party Advisory, VDB Entry
Security vulnerabilities fixed in Firefox 56 — Mozilla CONFIRM www.mozilla.org Vendor Advisory
Red Hat Customer Portal REDHAT access.redhat.com Third Party Advisory
Debian -- Security Information -- DSA-3998-1 nss DEBIAN www.debian.org Third Party Advisory
Debian -- Security Information -- DSA-4014-1 thunderbird DEBIAN www.debian.org Third Party Advisory
Security vulnerabilities fixed in Firefox ESR 52.4 — Mozilla CONFIRM www.mozilla.org Vendor Advisory
[SECURITY] [DLA 1153-1] icedove/thunderbird security update MLIST lists.debian.org Third Party Advisory
Security vulnerabilities fixed in Thunderbird 52.4 — Mozilla CONFIRM www.mozilla.org Vendor Advisory
Debian -- Security Information -- DSA-3987-1 firefox-esr DEBIAN www.debian.org Third Party Advisory
Mozilla Thunderbird: Multiple vulnerabilities (GLSA 201803-14) — Gentoo security GENTOO security.gentoo.org Third Party Advisory
Mozilla Firefox and Firefox ESR Multiple Security Vulnerabilities BID www.securityfocus.com Third Party Advisory, VDB Entry
CPU Oct 2018 CONFIRM www.oracle.com
1377618 - (CVE-2017-7805) Potential UAF in TLS 1.2 server when verifying client authentication CONFIRM bugzilla.mozilla.org Issue Tracking, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 378166 Virtuozzo Linux Security Update for nss-tools (VZLSA-2017:2832)
  • 710287 Gentoo Linux Mozilla Firefox Multiple Vulnerabilities (GLSA 201802-03)
  • 710303 Gentoo Linux Mozilla Thunderbird Multiple Vulnerabilities (GLSA 201803-14)
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

CVE.report and Source URL Uptime Status status.cve.report