Description
`EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be abused in order to write data to a local disk which may have implications for private browsing mode. This vulnerability affects Firefox ESR < 115.6 and Firefox < 121.
References (6)
Core 6
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1864123
Mailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
Third Party Advisory
https://security.gentoo.org/glsa/202401-10
Third Party Advisory
https://www.debian.org/security/2023/dsa-5581
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-54/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-56/
Scores
CVSS v3
6.5
EPSS
0.0041
EPSS Percentile
61.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Details
Status
published
Products (5)
debian/debian_linux
10.0
debian/debian_linux
11.0
debian/debian_linux
12.0
mozilla/firefox
< 121.0
mozilla/firefox_esr
< 115.6
Published
Dec 19, 2023
Tracked Since
Feb 18, 2026