CVE-2021-23968: Medium severity Mozilla Thunderbird vulnerability
If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/firefoxto a version that resolves this vulnerability.Fixed in 118.0.2-1 - Upgrade
Upgrade
debian/firefox-esrto a version that resolves this vulnerability.Fixed in 91.12.0esr-1~deb10u1Fixed in 115.3.1esr-1~deb10u1Fixed in 102.15.0esr-1~deb11u1Fixed in 115.3.1esr-1~deb11u1Fixed in 102.15.1esr-1~deb12u1Fixed in 115.3.0esr-1~deb12u1Fixed in 115.3.0esr-1 - Upgrade
Upgrade
debian/thunderbirdto a version that resolves this vulnerability.Fixed in 1:91.12.0-1~deb10u1Fixed in 1:115.3.1-1~deb10u1Fixed in 1:102.13.1-1~deb11u1Fixed in 1:115.3.1-1~deb11u1Fixed in 1:102.15.1-1~deb12u1Fixed in 1:115.3.1-1~deb12u1Fixed in 1:115.3.1-1 - Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 78.8 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 86 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 78.8 - Upgrade
Upgrade
alpine/firefoxto a version that resolves this vulnerability.Fixed in 87.0-r0 - Upgrade
Upgrade
alpine/firefox-esrto a version that resolves this vulnerability.Fixed in 78.8.0-r0 - Upgrade
Upgrade
alpine/librewolfto a version that resolves this vulnerability.Fixed in 87.0-r0 - Upgrade
Upgrade
alpine/thunderbirdto a version that resolves this vulnerability.Fixed in 78.9.0-r0
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2021-23968?
CVE-2021-23968 has a moderate severity rating due to its potential to leak sensitive information via violation reports.
How do I fix CVE-2021-23968?
Updating to the latest versions of affected products such as Firefox 118.0.2-1, Firefox ESR 102.15.1esr-1, or Thunderbird 1:115.3.1-1 will mitigate the CVE-2021-23968 vulnerability.
Which versions are affected by CVE-2021-23968?
CVE-2021-23968 affects multiple versions of Firefox, Firefox ESR, and Thunderbird prior to their respective fixed versions.
What are the implications of CVE-2021-23968?
Exploitation of CVE-2021-23968 could allow attackers to access sensitive information from URIs in violation reports.
Does CVE-2021-23968 impact all operating systems?
CVE-2021-23968 affects Mozilla applications on various platforms, particularly versions in Debian.