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
Mozilla Thunderbird<52.1
52.1
Mozilla Firefox ESR<52.1
52.1
Mozilla Firefox ESR<45.9
45.9
Mozilla Firefox<53
53
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 workstation=6.0
redhat enterprise Linux workstation=7.0
Debian GNU/Linux=8.0
Mozilla Firefox<53.0
Mozilla Firefox=52.0
Mozilla Firefox ESR<45.9.0
Mozilla Thunderbird<52.1.0
Mozilla Firefox ESR=52.0
debian/firefox
135.0-1
debian/firefox-esr
115.14.0esr-1~deb11u1
128.7.0esr-1~deb11u1
128.5.0esr-1~deb12u1
128.7.0esr-1~deb12u1
128.7.0esr-1

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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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