Cyber Resilience

CVE-2002-0391

Memory Safety in Sunos 5.5.1 … 5.8

Public PoCHigh EPSSMemory Safety
Published
12 August 2002
Modified
16 April 2026
Patch / advisory
View advisory
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 0.58 99th percentile
Risk Priority 97 floored blend · peak EPSS

Summary

CVE-2002-0391 is a critical-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Sun Sunos. 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; a public proof-of-concept is referenced.

EU & UK References

Vulnerability Data

Integer overflow in xdr_array function in RPC servers for operating systems that use libc, glibc, or other code based on SunRPC including dietlibc, allows remote attackers to execute arbitrary code by passing a large number of arguments to xdr_array through…

more

RPC services such as rpc.cmsd and dmispd.

CWE(s)
CWE-190

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.

T1190 Exploit Public-Facing Application Initial Accessconfidence: HIGH
Remote integer overflow in SunRPC xdr_array enables arbitrary code execution against exposed RPC services.
attack.mitre.org →
inferred from description + CWE · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

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CVE-2026-50298Same vendor: Microsoft
CVE-2025-54110Same vendor: Microsoft
CVE-2023-28277Same vendor: Microsoft
CVE-2025-21243Same vendor: Microsoft
CVE-2024-38215Same vendor: Microsoft
CVE-2023-24871Same vendor: Microsoft
CVE-2024-30072Same vendor: Microsoft

Affected Assets

freebsd
freebsd
≤ 4.6.1
openbsd
openbsd
3.1
sun
solaris
2.6, 9.0
sun
sunos
5.5.1, 5.7, 5.8
microsoft
windows 2000
all versions
microsoft
windows nt
4.0
microsoft
windows xp
all versions

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.6

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.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require use of safe arithmetic, bounds checks, and testing that prevent integer overflows.

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.

A.8.29 Security testing in development and acceptance mostly match
detects

Security testing in development can detect integer overflows before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates input validation and arithmetic checks that prevent integer overflows.

A.8.26 Application security requirements partial match
degrades

Application security requirements include bounds checking and safe arithmetic to avoid overflow conditions.

A.8.27 Secure system architecture and engineering principles partial match
degrades

Secure architecture principles require defensive coding patterns that mitigate integer wraparound risks.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid unsafe integer operations and mandate overflow-safe constructs.

References