Home/CVE/Previously Firefox for macOS and Linux would download temporary files to a user-specific directory in /tmp, but this beh
CVE

CVE-2022-26386

Previously Firefox for macOS and Linux would download temporary files to a user-specific directory in /tmp, but this beh

Previously Firefox for macOS and Linux would download temporary files to a user-specific directory in /tmp, but this behavior was changed to download them to /tmp where they could be affected by other local users. This behavior was reverted to the original, user-specific directory. <br>This bug only affects Firefox for macOS and Linux. Other operating systems are unaffected..

This vulnerability affects Firefox ESR < 91.7 and Thunderbird < 91.7.

MEDIUM · CVSS 6.5 EPSS 0.00363
Schedule remediation
  • Public exploit or PoC is available
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-377Insecure Temporary File
▤

Affected Products & Versions

2
mozilla firefox esr< 91.7
mozilla thunderbird< 91.7
⚠

Public Exploits & PoCs

1
pocbugzilla.mozilla.org · show_bug.cgi?id=1752396bugzilla.mozilla.org
◈

Sigma Hunt Rules

8
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.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

6.5
MEDIUM · 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:L/PR:N/UI:R/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
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

19
suse-csafopenSUSE-SU-2024:11909-1
usnUSN-5345-1
suse-csafopenSUSE-SU-2022:0906-1
suse-csafSUSE-SU-2022:0906-1
suse-csafopenSUSE-SU-2022:0821-1
🔗

References & Sources

2
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/mfsa2022-11/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-12/Vendor Advisory
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