Critical severity · published Feb 4, 2025
CVE-2025-1017
Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 128.7.0; before 135.0 · source: NVD
TH
Thunderbird · Mozilla
128.0.1 before 128.7.0; 131.0 before 135.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-1017
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-1017
Broken Link
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1926256%2C1935984%2C1935471
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-07/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-09/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-10/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-11/
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html
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