CVE-2022-23943
Published: 14 March 2022
Summary
CVE-2022-23943 is a critical-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Fedoraproject Fedora. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 1.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2022-23943 is an out-of-bounds write vulnerability in the mod_sed module of Apache HTTP Server that stems from integer overflow issues (CWE-190) and permits an attacker to overwrite heap memory with controlled data. It affects all 2.4.x releases through 2.4.52 and carries a CVSS 3.1 base score of 9.8.
An unauthenticated network attacker can trigger the flaw by sending a crafted request that reaches mod_sed, resulting in remote heap corruption that may be leveraged for arbitrary code execution, information disclosure, or denial of service.
Public advisories published by the Apache HTTP Server project, Debian LTS, and Fedora list updated packages that correct the defect; operators are advised to upgrade to a patched version of httpd 2.4.53 or later. The associated EPSS score reached a peak of 0.6855, indicating measurable post-disclosure exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-28861
Vulnerability details
Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 version 2.4.52 and prior versions.
- 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.