critical
9.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2017-7801: Use After Free

First published: Tue Aug 08 2017(Updated: )

A use-after-free vulnerability can occur while re-computing layout for a "marquee" element during window resizing where the updated style object is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

Credit: security@mozilla.org

Affected SoftwareAffected VersionHow to fix
debian/firefox
118.0.2-1
debian/firefox-esr
91.12.0esr-1~deb10u1
115.3.1esr-1~deb10u1
102.15.0esr-1~deb11u1
115.3.1esr-1~deb11u1
102.15.1esr-1~deb12u1
115.3.0esr-1~deb12u1
115.3.0esr-1
Mozilla Thunderbird<52.3
52.3
Mozilla Firefox ESR<52.3
52.3
Mozilla Firefox<55
55
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Red Hat Enterprise Linux=6.0
Red Hat Enterprise Linux=7.0
redhat enterprise Linux desktop=6.0
redhat enterprise Linux desktop=7.0
redhat enterprise Linux server=6.0
redhat enterprise Linux server=7.0
redhat enterprise Linux server aus=7.3
redhat enterprise Linux server aus=7.4
redhat enterprise Linux server eus=7.3
redhat enterprise Linux server eus=7.4
redhat enterprise Linux server eus=7.5
redhat enterprise Linux workstation=6.0
redhat enterprise Linux workstation=7.0
Mozilla Firefox<55.0
Mozilla Firefox ESR<52.3.0
Mozilla Thunderbird<52.3.0

Remedy

https://bugzilla.mozilla.org/show_bug.cgi?id=1371259

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2017-7801?

    CVE-2017-7801 is classified as a high severity use-after-free vulnerability that could result in a potentially exploitable crash.

  • How do I fix CVE-2017-7801?

    To fix CVE-2017-7801, update your Mozilla Thunderbird and Firefox applications to version 52.3 or later.

  • Which versions of Thunderbird are affected by CVE-2017-7801?

    CVE-2017-7801 affects Thunderbird versions prior to 52.3.

  • Is CVE-2017-7801 present in all Firefox versions?

    CVE-2017-7801 impacts Firefox versions prior to 55, including Firefox ESR versions before 52.3.

  • What platforms are affected by CVE-2017-7801?

    CVE-2017-7801 affects multiple platforms running outdated versions of Thunderbird and Firefox, particularly on Debian and Red Hat Enterprise Linux.

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