CVE-2021-29945: Medium severity Mozilla Thunderbird vulnerability
The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. Note: This issue only affected x86-32 platforms. Other platforms are unaffected.
Other sources
The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. Note: This issue only affected x86-32 platforms. Other platforms are unaffected.. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
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
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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
Upgrade
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
Upgrade
alpine/librewolfto a version that resolves this vulnerability.Fixed in 88.0-r0 - Upgrade
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alpine/mozjs78to a version that resolves this vulnerability.Fixed in 78.10.0-r0 - Upgrade
Upgrade
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 the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-29945.
What is the severity level of CVE-2021-29945?
CVE-2021-29945 has a severity level of medium.
Which platforms are affected by CVE-2021-29945?
Only x86-32 platforms are affected by CVE-2021-29945. Other platforms are unaffected.
Which software products are affected by CVE-2021-29945?
Mozilla Thunderbird (up to version 78.10), Mozilla Firefox ESR (up to version 78.10), and Mozilla Firefox (up to version 88) are affected by CVE-2021-29945.
How can I fix the CVE-2021-29945 vulnerability?
To fix the CVE-2021-29945 vulnerability, update Mozilla Thunderbird to version 78.10, Mozilla Firefox ESR to version 78.10, or Mozilla Firefox to version 88.