CVE-2023-29532

Description

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server. *Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.* This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.07%

Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox

Affected: Mozilla Firefox ESR

Affected: Mozilla Thunderbird

References

Link	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1806394	permissions required
https://www.mozilla.org/security/advisories/mfsa2023-13/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2023-14/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2023-15/	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-29532?: CVE-2023-29532 has been scored as a medium severity vulnerability.
How to fix CVE-2023-29532?: To fix CVE-2023-29532, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-29532 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-29532 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-29532?: CVE-2023-29532 affects Mozilla Firefox, Mozilla Firefox ESR, Mozilla Thunderbird.

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