CVE-2014-3931
Published: 31 March 2017
Summary
CVE-2014-3931 is a critical-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Multi-Router Looking Glass Project Multi-Router Looking Glass. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 2.1% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2014-3931 is a memory corruption vulnerability in fastping.c within MRLG (Multi-Router Looking Glass) versions prior to 5.5.0. The flaw is categorized under CWE-119 and carries a CVSS 3.1 base score of 9.8, reflecting network-accessible arbitrary memory writes that can corrupt process memory.
Remote attackers with no authentication or user interaction required can send crafted input to trigger the defect, achieving arbitrary memory writes that lead to full compromise of confidentiality, integrity, and availability on the affected system.
Public references, including the MRLG project site and the detailed analysis at s3.eurecom.fr, identify the issue and point to version 5.5.0 as the release that resolves the memory-write condition. A HackerOne report also documents the finding, confirming the availability of the patched release for remediation.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2014-3868
Vulnerability details
fastping.c in MRLG (aka Multi-Router Looking Glass) before 5.5.0 allows remote attackers to cause an arbitrary memory write and memory corruption.
- CWE(s)
- KEV Date Added
- 07 July 2025
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly blocks the crafted remote input in fastping.c that triggers arbitrary memory writes (CWE-119) before corruption occurs.
Requires prompt application of the MRLG 5.5.0 patch that eliminates the memory-write flaw in fastping.c.
Architectural memory protections (DEP, ASLR) can limit exploitability of the arbitrary-write condition even if input validation fails.