Linux · Ubuntu · Package update · December 19, 2023

firefox 121.0+build1-0ubuntu0.20.04.1: firefox 121.0+build1-0ubuntu0.20.04.1 for Ubuntu 20.04 LTS (focal)

firefox 121.0+build1-0ubuntu0.20.04.1, released December 19, 2023, fixes 16 CVEs in firefox. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

HighUnsupported product
CVEs closed
16
None rated Critical
Exploited
0
None reported
Highest CVSS
8.8
Base score, 0 to 10
Highest EPSS
0.2063
97th percentile

Priority of the 16 CVEs

Patch now 0 Urgent 0 High 9 Routine 7

Fixed package versions

ProductReleaseFixed in
firefoxUbuntu 20.04 LTS (focal)121.0+build1-0ubuntu0.20.04.1

CVEs this fix closes

PriorityCVETitleCVSSEPSSExploitation
High CVE-2023-6856 Mozilla Firefox ESR and 5 others: The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems…8.8 0.2063 None reported
High CVE-2023-6858 Mozilla Firefox ESR and 5 others: Out-of-bounds Write8.8 0.0154 None reported
High CVE-2023-6861 Mozilla Firefox ESR and 5 others: The `nsWindow::PickerOpen(void)` method was susceptible to a heap buffer overflow when running in headless…8.8 0.0141 None reported
High CVE-2023-6864 Mozilla Firefox ESR and 5 others: Memory safety bugs present in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5.8.8 0.0119 None reported
High CVE-2023-6859 Mozilla Firefox ESR and 5 others: A use-after-free condition affected TLS socket creation when under memory pressure.8.8 0.0109 None reported
High CVE-2023-6863 Mozilla Firefox ESR and 5 others: The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic…8.8 0.0104 None reported
High CVE-2023-6865 Mozilla Firefox ESR and 3 others: `EncryptingOutputStream` was susceptible to exposing uninitialized data.7.5 0.0089 None reported
High CVE-2023-6873 Mozilla Firefox ESR and 3 others: Memory safety bugs present in Firefox 120.8.8 0.0085 None reported
High CVE-2023-6866 Mozilla Firefox ESR and 3 others: TypedArrays can be fallible and lacked proper exception handling.8.8 0.0068 None reported
Routine CVE-2023-6860 Mozilla Firefox ESR and 5 others: The `VideoBridge` allowed any content process to use textures produced by remote decoders.6.5 0.0096 None reported
Routine CVE-2023-6135 Mozilla Firefox ESR and 3 others: Multiple NSS NIST curves were susceptible to a side-channel attack known as "Minerva".4.3 0.0071 None reported
Routine CVE-2023-6867 Mozilla Firefox ESR and 3 others: The timing of a button click causing a popup to disappear was approximately the same length as the anti-clickjacking…6.1 0.0068 None reported
Routine CVE-2023-6857 thunderbird: When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be smaller than necessary6.1 0.0067 None reported
Routine CVE-2023-6872 Mozilla Firefox ESR and 3 others: Browser tab titles were being leaked by GNOME to system logs.6.5 0.0065 None reported
Routine CVE-2023-6869 Mozilla Firefox ESR and 3 others: A `<dialog>` element could have been manipulated to paint content outside of a sandboxed iframe.6.5 0.0056 None reported
Routine CVE-2023-6871 Mozilla Firefox ESR and 3 others: Under certain conditions, Firefox did not display a warning when a user attempted to navigate to a new…4.3 0.0049 None reported
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