CVE-2017-7805

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    CVE-2017-7805

    Published: 11 Jun 2018Last Modified: 16 Apr 2026

    Summary:

    Details: 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.

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

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High