Security Resilience

CVE-2014-3931

Memory Safety in Multi-Router Looking Glass Project Multi-Router Looking Glass ≤ 5.4.1

CISA KEVActive ExploitationEUVD ExploitedPublic PoCMemory Safety
Published
31 March 2017
Modified
21 April 2026
KEV Added
07 July 2025
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.29 98th percentile
Risk Priority 97 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

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% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.

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-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

Vulnerability Data

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

CVEs Like This One

CVE-2022-22706Shared CWE-119both on KEV
CVE-2023-6549Shared CWE-119both on KEV
CVE-2026-88779Shared CWE-119both on KEV
CVE-2017-1000253Shared CWE-119both on KEV
CVE-2010-3765Shared CWE-119both on KEV
CVE-2017-6738Shared CWE-119both on KEV
CVE-2017-6743Shared CWE-119both on KEV
CVE-2017-6737Shared CWE-119both on KEV
CVE-2017-0022Shared CWE-119both on KEV
CVE-2012-2034Shared CWE-119both on KEV

Affected Assets

multi-router looking glass project
multi-router looking glass
≤ 5.4.1

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.

addresses: CWE-119

Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.

addresses: CWE-119

Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.

addresses: CWE-119

Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.

addresses: CWE-119

Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.

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.

blocks

A.8.25 mandates secure SDLC practices (secure coding guidelines, security requirements, testing including code scans and penetration tests, developer training) that reach buffer management and can stop many buffer overruns from reaching production, but leaves a bounded remainder (e.g. flaws in non-software components, incomplete enforcement of guidelines, or post-deployment changes)

blocks

Application security requirements can specify memory-safety rules, but do not prescribe implementation details.

blocks

A.8.27 mandates security-by-design principles (e.g. least privilege, fail securely, distrust external input, hardening) plus design reviews that can catch and stop buffer-boundary errors before they reach code, but this is only one minority slice of CWE-119's broad surface (language-specific flaws, unsafe library use, compiler/runtime mitigations, and post-deployment instances remain outside its direct scope).

prevents

Secure coding standards explicitly forbid unsafe buffer operations, directly eliminating CWE-119.

finds

Security testing in development catches out-of-bounds accesses before release, covering most instances of the weakness.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-119, a class-level weakness. Rules are authored against its narrower children: CWE-823.

References