Home/CVE/When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming t
CVE

CVE-2022-26387

When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming t

When installing an add-on, Firefox verified the signature before prompting the user.

but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.

HIGH · CVSS 7.5 EPSS 0.00236
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
▤

Affected Products & Versions

3
mozilla firefox< 98.0
mozilla firefox esr< 91.7
mozilla thunderbird< 91.7
⚠

Public Exploits & PoCs

1
pocbugzilla.mozilla.org · show_bug.cgi?id=1752979bugzilla.mozilla.org
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Dec 2022 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

24
suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:11908-1
suse-csafopenSUSE-SU-2024:11909-1
usnUSN-5345-1
suse-csafopenSUSE-SU-2022:0906-1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.mozilla.org/security/advisories/mfsa2022-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-11/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-12/Vendor Advisory
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