VULNERABILITY

MFSA2025-19 Firefox: Security Vulnerability fixed in Firefox 136.0.4, Firefox ESR 128.8.1, Firefox ESR 115.21.1 (CVE-2025-2857)

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MFSA2025-19 Firefox: Security Vulnerability fixed in Firefox 136.0.4, Firefox ESR 128.8.1, Firefox ESR 115.21.1 (CVE-2025-2857)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:N/I:C/A:C)
Published
03/27/2025
Created
03/29/2025
Added
03/28/2025
Modified
03/31/2025

Description

Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code. A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape. The original vulnerability was being exploited in the wild. *This only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 136.0.4, Firefox ESR < 128.8.1, and Firefox ESR < 115.21.1.

Solution(s)

  • mozilla-firefox-esr-upgrade-115_21_1
  • mozilla-firefox-esr-upgrade-128_8_1
  • mozilla-firefox-upgrade-136_0_4

References

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