CVE-2023-25732

HIGH

Firefox < 110.0 and Firefox ESR < 102.8 - Out-of-bounds Write in xpcom inputStream Encoding

Title source: llm

Description

When encoding data from an <code>inputStream</code> in <code>xpcom</code> the size of the input being encoded was not correctly calculated potentially leading to an out of bounds memory write. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

References (4)

Core 4

Core References

Issue Tracking, Permissions Required

https://bugzilla.mozilla.org/show_bug.cgi?id=1804564

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2023-05/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2023-06/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2023-07/

Scores

CVSS v3 8.8

EPSS 0.0015

EPSS Percentile 35.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-787

Status published

Products (3)

mozilla/firefox < 110.0

mozilla/firefox_esr < 102.8

mozilla/thunderbird < 102.8

Published Jun 02, 2023

Tracked Since Feb 18, 2026