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CVE-2003-0356

Critical Vulnerability: CVE-2003-0356 — ethereal — ethereal

Multiple off-by-one vulnerabilities in Ethereal 0.9.11 and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via the (1) AIM, (2) GIOP Gryphon, (3) OSPF, (4) PPTP, (5) Quake, (6) Quake2, (7) Quake3, (8) Rsync, (9) SMB, (10) SMPP, and (11) TSP dissectors, which do not properly use the tvb_get_nstringz and tvb_get_nstringz0 functions.

Sunday, April 19, 2026etherealVulnios Threat Intelligence
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Executive Summary

Multiple off-by-one vulnerabilities in Ethereal 0.9.11 and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via the (1) AIM, (2) GIOP Gryphon, (3) OSPF, (4) PPTP, (5) Quake, (6) Quake2, (7) Quake3, (8) Rsync, (9) SMB, (10) SMPP, and (11) TSP dissectors, which do not properly use the tvb_get_nstringz and tvb_get_nstringz0 functions.

Why It Matters

CVE-2003-0356 is rated CRITICAL severity, requiring immediate attention from security teams.

CVSS Base Score: 9.8/10

Affected Technologies

Vendors: ethereal

Products: ethereal

🛡️What Defenders Should Check

  • Check if you are affected — Review your asset inventory for products listed in CVE-2003-0356.
  • Apply available patches — Visit vendor advisories for the latest security updates.
  • Monitor for exploitation — Check your SIEM/IDS logs for related indicators.

    • Use Vulnios to continuously monitor your exposure to CVE-2003-0356 and similar vulnerabilities.

    References & Sources

  • http://www.debian.org/security/2003/dsa-313
  • http://www.ethereal.com/appnotes/enpa-sa-00009.html
  • http://www.kb.cert.org/vuls/id/641013
  • http://www.mandriva.com/security/advisories?name=MDKSA-2003:067
  • http://www.redhat.com/support/errata/RHSA-2003-077.html
  • https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A69
  • http://www.debian.org/security/2003/dsa-313
  • http://www.ethereal.com/appnotes/enpa-sa-00009.html
  • http://www.kb.cert.org/vuls/id/641013
  • http://www.mandriva.com/security/advisories?name=MDKSA-2003:067

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    Affected Products

    ethereal

    Sources

    criticaldos

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