CVE-2025-7208
Published: 09 July 2025
Summary
CVE-2025-7208 is a low-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in 9Fans Plan9Port. Its CVSS base score is 2.0 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 30.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-2 (Flaw Remediation) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2025-7208 is a critical heap-based buffer overflow vulnerability in 9fans plan9port up to commit 9da5b44, affecting the edump function in the library /src/plan9port/src/libsec/port/x509.c. Published on 2025-07-09, it is associated with CWEs-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-122 (Heap-based Buffer Overflow), earning a CVSS v3.1 base score of 5.5.
An attacker with adjacent network access (AV:A) and low privileges (PR:L) can exploit this issue with low attack complexity (AC:L) and no user interaction (UI:N), resulting in low impacts to confidentiality, integrity, and availability (C:I:A:L/L/L) in the unchanged security scope (S:U). The manipulation triggers the buffer overflow, and a public exploit has been disclosed.
Due to the product's rolling release model, specific affected and fixed version details are unavailable, but the patch identifier b3e06559475b0130a7a2fb56ac4d131d13d2012f addresses the issue. Security practitioners are advised to apply this patch, with details available in references such as the 9front git commit and the 9fans/plan9port GitHub issue #710.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-20766
Vulnerability details
A vulnerability was found in 9fans plan9port up to 9da5b44. It has been classified as critical. This affects the function edump in the library /src/plan9port/src/libsec/port/x509.c. The manipulation leads to heap-based buffer overflow. The exploit has been disclosed to the public…
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and may be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The identifier of the patch is b3e06559475b0130a7a2fb56ac4d131d13d2012f. It is recommended to apply a patch to fix this issue.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap buffer overflow in X.509 parsing code enables local/adjacent code execution for privilege escalation.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires applying the vendor patch (b3e06559) that eliminates the heap overflow in edump.
Enforces memory-protection mechanisms that can block exploitation of the heap-based buffer overflow.
Mandates input validation and bounds checking that would have prevented the unchecked manipulation reaching edump.