CVE-2021-24002: High severity Mozilla Thunderbird vulnerability
When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would have been interpreted as such and allowed arbitrary commands to be sent to the FTP server.
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 78.10 - Upgrade
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Firefoxto a version that resolves this vulnerability.Fixed in 88 - Upgrade
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Firefox ESRto a version that resolves this vulnerability.Fixed in 78.10 - Upgrade
Upgrade
alpine/firefoxto a version that resolves this vulnerability.Fixed in 88.0-r0 - Upgrade
Upgrade
alpine/firefox-esrto a version that resolves this vulnerability.Fixed in 78.10.0-r0 - Upgrade
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alpine/librewolfto a version that resolves this vulnerability.Fixed in 88.0-r0 - Upgrade
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alpine/thunderbirdto a version that resolves this vulnerability.Fixed in 91.3.2-r0
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is CVE-2021-24002?
CVE-2021-24002 is a vulnerability that allowed arbitrary commands to be sent to an FTP server when a user clicked on an FTP URL containing encoded newline characters.
Which software is affected by CVE-2021-24002?
Mozilla Thunderbird 78.10, Mozilla Firefox 88, and Mozilla Firefox ESR 78.10 are affected by CVE-2021-24002.
What is the severity of CVE-2021-24002?
The severity of CVE-2021-24002 is medium, with a severity value of 4.
How can I fix CVE-2021-24002?
To fix CVE-2021-24002, update your Mozilla Thunderbird to version 78.10, Mozilla Firefox to version 88, or Mozilla Firefox ESR to version 78.10.
Where can I find more information about CVE-2021-24002?
You can find more information about CVE-2021-24002 on the Mozilla Bugzilla and Mozilla Security Advisories websites.