Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSummary
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% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to CM-7 (Least Functionality) and SI-2 (Flaw Remediation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
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 Data
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
Likely ATT&CK TechniquesAI
Techniques this vulnerability likely enables, inferred from its description, weakness type, and attributed-actor tradecraft. Confidence is per-technique.
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
Mitigating Controls (NIST 800-53 r5) AI
Directly requires timely installation of security-relevant patches, which is the vendor-prescribed fix that eliminates the out-of-bounds write in mod_sed.
Requires disabling or restricting non-essential modules such as mod_sed, thereby removing the vulnerable code path before any crafted request can reach it.
Mandates scanning for known vulnerable versions of httpd, enabling discovery of 2.4.52 and earlier instances that contain the integer-overflow flaw.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require use of safe arithmetic, bounds checks, and testing that prevent integer overflows.
Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.
Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing in development can detect integer overflows before release.
Secure SDLC mandates input validation and arithmetic checks that prevent integer overflows.
Application security requirements include bounds checking and safe arithmetic to avoid overflow conditions.
Secure architecture principles require defensive coding patterns that mitigate integer wraparound risks.
Secure coding standards explicitly forbid unsafe integer operations and mandate overflow-safe constructs.
Change management can enforce review gates that catch unsafe memory operations before deployment.