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Vulnerability record · CVE-2002-2443 · published 29 May 2013

CVE-2002-2443: Mit kerberos 5 improper input validation vulnerability

Mit · Kerberos 5

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.

5.0 CVSS 2.0 Medium EPSS 6.4% · top 6.5% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
6.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
10Affected product versions listed by NVD
24References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

10 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2002-2443), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.