CVE-2022-25293
Published: 24 February 2022
Summary
CVE-2022-25293 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Watchguard Fireware. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 9.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
A stack-based buffer overflow vulnerability exists in the systemd component of WatchGuard Firebox and XTM appliances running Fireware OS. The flaw, tracked as CVE-2022-25293 and assigned CWE-787, affects versions prior to 12.7.2_U2, 12.x prior to 12.1.3_U8, and 12.2.x through 12.5.x prior to 12.5.9_U2. It carries a CVSS 3.1 score of 8.8 and can be triggered when an authenticated remote user initiates a firmware update using a malicious upgrade image.
An authenticated remote attacker can supply a crafted firmware image to trigger the overflow, resulting in arbitrary code execution on the appliance with the privileges of the update process. Because the attack requires valid credentials and network access to the management interface, it is not exploitable by unauthenticated parties.
WatchGuard addressed the issue in the Fireware 12.7.2 release notes, which list the resolved buffer overflow and direct customers to upgrade to the fixed builds (12.7.2_U2, 12.1.3_U8, or 12.5.9_U2) to eliminate the vulnerable code path. The current EPSS score of 0.0576 with a peak of 0.0595 indicates limited observed exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-29982
Vulnerability details
A systemd stack-based buffer overflow in WatchGuard Firebox and XTM appliances allows an authenticated remote attacker to potentially execute arbitrary code by initiating a firmware update with a malicious upgrade image. This vulnerability impacts Fireware OS before 12.7.2_U2, 12.x before…
more
12.1.3_U8, and 12.2.x through 12.5.x before 12.5.9_U2.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.