CVE-2022-40958 — Injection in Mozilla Firefox

CWE-74 — InjectionCWE-784 — Reliance on Cookies without Validation and Integrity Checking in a Security Decision13 documents9 sources
Severity
6.5MEDIUMNVD
OSV5.5
EPSS
0.4%
top 41.11%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedDec 22
Latest updateMay 6

Description

By injecting a cookie with certain special characters, an attacker on a shared subdomain which is not a secure context could set and thus overwrite cookies from a secure context, leading to session fixation and other attacks. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NExploitability: 2.8 | Impact: 3.6

Affected Packages8 packages

▶CVEListV5mozilla/firefoxunspecified — 105
▶NVDmozilla/firefox< 105.0
▶CVEListV5mozilla/firefox_esrunspecified — 102.3
▶NVDmozilla/firefox_esr< 102.3
▶CVEListV5mozilla/thunderbirdunspecified — 102.3

🔴Vulnerability Details

4
GHSA
GHSA-7mxj-29p2-6g84: By injecting a cookie with certain special characters, an attacker on a shared subdomain which is not a secure context could set and thus overwrite co↗2022-12-22
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OSV
CVE-2022-40958: By injecting a cookie with certain special characters, an attacker on a shared subdomain which is not a secure context could set and thus overwrite co↗2022-12-22
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CVEList
CVE-2022-40958: By injecting a cookie with certain special characters, an attacker on a shared subdomain which is not a secure context could set and thus overwrite co↗2022-12-22
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OSV
thunderbird vulnerabilities↗2022-11-11
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📋Vendor Advisories

7
Ubuntu
Thunderbird vulnerabilities↗2022-11-11
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Ubuntu
Firefox vulnerabilities↗2022-09-30
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Red Hat
Mozilla: Bypassing Secure Context restriction for cookies with __Host and __Secure prefix↗2022-09-20
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Debian
CVE-2022-40958: firefox - By injecting a cookie with certain special characters, an attacker on a shared s...↗2022
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Mozilla
Mozilla Foundation Security Advisory 2022-42: CVE-2022-40958↗
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💬Community

1
Bugzilla
Nameless cookies can be used to shadow Secure cookies from an insecure connection↗2025-05-06
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CVE-2022-40958 — Injection in Mozilla Firefox | cvebase