critical
9.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2018-5091: Use After Free

First published: Tue Jan 23 2018(Updated: )

A use-after-free vulnerability can occur during WebRTC connections when interacting with the DTMF timers. This results in a potentially exploitable crash.

Credit: security@mozilla.org security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Firefox ESR<52.6
52.6
Mozilla Firefox<58
58
Debian Debian Linux=7.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Redhat Enterprise Linux=6.0
Redhat 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<58.0
Mozilla Firefox ESR<52.6.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=17.10
debian/firefox
131.0.2-2
debian/firefox-esr
115.14.0esr-1~deb11u1
128.3.1esr-1~deb11u1
115.14.0esr-1~deb12u1
128.3.1esr-1~deb12u1
128.3.0esr-2
128.3.1esr-2

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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 CVE-2018-5091?

    CVE-2018-5091 is a use-after-free vulnerability that can occur during WebRTC connections when interacting with the DTMF timers, resulting in a potentially exploitable crash.

  • Which software versions are affected by CVE-2018-5091?

    Firefox ESR versions below 52.6 and Firefox versions below 58 are affected by CVE-2018-5091.

  • What is the severity of CVE-2018-5091?

    CVE-2018-5091 has a severity rating of critical.

  • What is the remedy for CVE-2018-5091?

    To fix CVE-2018-5091, update Firefox to version 58.0 or later.

  • Where can I find more information about CVE-2018-5091?

    You can find more information about CVE-2018-5091 on the following references: [Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1423086), [Mozilla Security Advisory](https://www.mozilla.org/en-US/security/advisories/mfsa2018-02/), [CVE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5091).

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