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Fencer Vulns
medium 5.0

CVE-2002-2443 json

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…

published 2013-05-29 13 y ago modified 2026-06-16 4 mo ago also EUVD-2002-2421

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.4%
EPSS 6.4% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

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.

Patch / fix

  • mit kerberos_5 1.11.3
  • krb5 Debian 14, Debian 13, Debian 12 1.10.1+dfsg-6

debian advisories DEBIAN-CVE-2002-2443

  • krb5 RHEL 5 1.6.1-70.el5_9.2
  • krb5 RHEL 6 1.10.3-10.el6_4.3
  • krb5-libs RHEL 5 1.6.1-70.el5_9.2
  • krb5-libs RHEL 6 1.10.3-10.el6_4.3
  • krb5-server RHEL 5 1.6.1-70.el5_9.2
  • krb5-server RHEL 6 1.10.3-10.el6_4.3
  • krb5-server-ldap RHEL 5 1.6.1-70.el5_9.2
  • krb5-server-ldap RHEL 6 1.10.3-10.el6_4.3

red hat advisories RHSA-2013:0942

  • krb5 openSUSE Tumbleweed 1.15-1.1

opensuse advisories openSUSE-SU-2024:10004-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2002-2443 updated cvss 5.0

krb5: UDP ping-pong flaw in kpasswd

  • Red Hat Enterprise Linux (v. 5 server) krb5 1.6.1-70.el5_9.2, krb5-libs 1.6.1-70.el5_9.2, krb5-server 1.6.1-70.el5_9.2, krb5-server-ldap 1.6.1-70.el5_9.2, krb5-workstation 1.6.1-70.el5_9.2 Red Hat Enterprise Linux Desktop (v. 6) krb5 1.10.3-10.el6_4.3, krb5-libs 1.10.3-10.el6_4.3, krb5-server 1.10.3-10.el6_4.3, krb5-server-ldap 1.10.3-10.el6_4.3, krb5-workstation 1.10.3-10.el6_4.3, krb5-pkinit-openssl 1.10.3-10.el6_4.3 Red Hat Enterprise Linux Desktop Optional (v. 6) krb5 1.10.3-10.el6_4.3, krb5-libs 1.10.3-10.el6_4.3, krb5-server 1.10.3-10.el6_4.3, krb5-server-ldap 1.10.3-10.el6_4.3, krb5-workstation 1.10.3-10.el6_4.3, krb5-pkinit-openssl 1.10.3-10.el6_4.3 Red Hat Enterprise Linux HPC Node (v. 6) krb5 1.10.3-10.el6_4.3, krb5-libs 1.10.3-10.el6_4.3, krb5-server 1.10.3-10.el6_4.3, krb5-server-ldap 1.10.3-10.el6_4.3, krb5-workstation 1.10.3-10.el6_4.3, krb5-pkinit-openssl 1.10.3-10.el6_4.3 Red Hat Enterprise Linux HPC Node Optional (v. 6) krb5 1.10.3-10.el6_4.3, krb5-libs 1.10.3-10.el6_4.3, krb5-server 1.10.3-10.el6_4.3, krb5-server-ldap 1.10.3-10.el6_4.3, krb5-workstation 1.10.3-10.el6_4.3, krb5-pkinit-openssl 1.10.3-10.el6_4.3 Red Hat Enterprise Linux Server (v. 6) krb5 1.10.3-10.el6_4.3, krb5-libs 1.10.3-10.el6_4.3, krb5-server 1.10.3-10.el6_4.3, krb5-server-ldap 1.10.3-10.el6_4.3, krb5-workstation 1.10.3-10.el6_4.3, krb5-pkinit-openssl 1.10.3-10.el6_4.3
    +1 more products
    Red Hat Enterprise Linux Workstation (v. 6) krb5 1.10.3-10.el6_4.3, krb5-libs 1.10.3-10.el6_4.3, krb5-server 1.10.3-10.el6_4.3, krb5-server-ldap 1.10.3-10.el6_4.3, krb5-workstation 1.10.3-10.el6_4.3, krb5-pkinit-openssl 1.10.3-10.el6_4.3
    fixed: vendor fix RHSA-2013:0942

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

6.43% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.