What’s Vulnerable › Vulnerabilities

CVE-2002-2443

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2013-05-29 · updated 2026-06-16
• Weakness: CWE-20

Description

schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not properly validate UDP packets before sending responses, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged packet that triggers a communication loop, as demonstrated by krb_pingpong.nasl, a related issue to CVE-1999-0103.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 15.04, 15.10
• Debian Linux: 6.0, 7.0, 8.0
• Fedoraproject Fedora: 17, 18, 19
• MIT Kerberos 5: before 1.11.3 — fixed in 1.11.3
• Opensuse: 11.4, 12.2, 12.3
• RedHat Enterprise Linux Desktop: 5.0, 6.0
• RedHat Enterprise Linux Eus: 5.9, 6.4
• RedHat Enterprise Linux Server: 5.0, 6.0
• RedHat Enterprise Linux Server Aus: 6.4
• RedHat Enterprise Linux Workstation: 5.0, 6.0

How to fix

Upgrade to a fixed version: MIT Kerberos 5 1.11.3. Check the vendor advisory for mitigations.

References

• http://krbdev.mit.edu/rt/Ticket/Display.html?id=7637
• http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105879.html
• http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105978.html
• http://lists.fedoraproject.org/pipermail/package-announce/2013-May/106698.html
• http://lists.opensuse.org/opensuse-updates/2013-07/msg00004.html
• http://lists.opensuse.org/opensuse-updates/2013-07/msg00007.html
• http://rhn.redhat.com/errata/RHSA-2013-0942.html
• http://www.debian.org/security/2013/dsa-2701
• http://www.mandriva.com/security/advisories?name=MDVSA-2013:166
• http://www.ubuntu.com/usn/USN-2810-1
• https://bugzilla.redhat.com/show_bug.cgi?id=962531
• https://github.com/krb5/krb5/commit/cf1a0c411b2668c57c41e9c4efd15ba17b6b322c

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