critical
9.8
CWE
416
Advisory Published
Updated

CVE-2017-5434: Use After Free

First published: Wed Apr 19 2017(Updated: )

A use-after-free vulnerability occurs when redirecting focus handling which results in a potentially exploitable crash.

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

Affected SoftwareAffected VersionHow to fix
Thunderbird<52.1
52.1
Firefox<53
53
Firefox ESR<45.9
45.9
Firefox ESR<52.1
52.1
Red Hat Enterprise Linux Desktop=6.0
Red Hat Enterprise Linux Desktop=7.0
Red Hat Enterprise Linux Server=6.0
Red Hat Enterprise Linux Server=7.0
Red Hat Enterprise Linux Workstation=6.0
Red Hat Enterprise Linux Workstation=7.0
Debian Linux=8.0
Firefox<53.0
Firefox=52.0
Firefox ESR<45.9.0
Thunderbird<52.1.0
Firefox ESR=52.0
debian/firefox
137.0-1
debian/firefox-esr
115.14.0esr-1~deb11u1
128.9.0esr-1~deb11u1
128.8.0esr-1~deb12u1
128.9.0esr-1~deb12u1
128.8.0esr-1
128.9.0esr-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 the severity of CVE-2017-5434?

    CVE-2017-5434 is rated as a high severity vulnerability due to its potential for exploitation leading to crashes.

  • How do I fix CVE-2017-5434?

    To fix CVE-2017-5434, update affected software such as Mozilla Thunderbird or Firefox to the latest version.

  • Which software is affected by CVE-2017-5434?

    CVE-2017-5434 affects Mozilla Thunderbird and several versions of Firefox including Firefox ESR.

  • Can CVE-2017-5434 lead to remote code execution?

    CVE-2017-5434 does not directly lead to remote code execution but can result in crashes that might be exploitable.

  • What is a use-after-free vulnerability in relation to CVE-2017-5434?

    A use-after-free vulnerability like CVE-2017-5434 occurs when a program accesses memory after it has been freed, potentially leading to unstable behavior.

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