CVE-2020-15656: High severity Mozilla Firefox vulnerability
JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 78.1 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 79 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 78.1 - Upgrade
Upgrade
debian/firefoxto a version that resolves this vulnerability.Fixed in 148.0.2-1 - Upgrade
Upgrade
debian/thunderbirdto a version that resolves this vulnerability.Fixed in 1:115.12.0-1~deb11u1Fixed in 1:140.8.0esr-1~deb11u1Fixed in 1:140.6.0esr-1~deb12u1Fixed in 1:140.8.0esr-1~deb12u1Fixed in 1:140.6.0esr-1~deb13u1Fixed in 1:140.8.0esr-1~deb13u1Fixed in 1:140.8.0esr-1 - Upgrade
Upgrade
alpine/firefoxto a version that resolves this vulnerability.Fixed in 79.0-r0 - Upgrade
Upgrade
alpine/firefox-esrto a version that resolves this vulnerability.Fixed in 78.1.0-r0 - Upgrade
Upgrade
alpine/librewolfto a version that resolves this vulnerability.Fixed in 79.0-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-2020-15656?
The severity of CVE-2020-15656 is rated as moderate.
Which software products are affected by CVE-2020-15656?
Mozilla Firefox ESR 78.1, Mozilla Thunderbird 78.1, and Mozilla Firefox up to version 79 are affected by CVE-2020-15656.
How can I mitigate the risk of CVE-2020-15656?
Apply the recommended remedy versions: Mozilla Firefox ESR 78.1, Mozilla Thunderbird 78.1, and Mozilla Firefox version up to 79.
Where can I find more information about CVE-2020-15656?
You can find more information about CVE-2020-15656 on the following references: [Bugzilla Mozilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1647293), [Mozilla Security Advisory mfsa2020-33](https://www.mozilla.org/en-US/security/advisories/mfsa2020-33/), [Mozilla Security Advisory mfsa2020-30](https://www.mozilla.org/en-US/security/advisories/mfsa2020-30/)