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CVE-2002-2443

schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not...

5.0 MediumFix available

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.

Exploit likelihood

6.18%Up 4.0 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

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.

Record
CVE-2002-2443
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2002-2443
Updated
2026-11-02
EUVDEUVD-2002-2421 No score

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.

Record
EUVD-2002-2421
Updated
2026-11-03
GitHub AdvisoriesGHSA-cqf2-6q6w-6cqw No score

schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not...

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.

Record
GHSA-cqf2-6q6w-6cqw
Weakness
CWE-20
Updated
2026-11-02
OSV No score

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.

Record
CVE-2002-2443
Updated
2026-11-02
OSVDEBIAN-CVE-2002-2443 No score

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.

Record
DEBIAN-CVE-2002-2443
Updated
2026-11-02
Show 4 moreShow less
OSVMGASA-2013-0161 No score

Updated krb5 packages fix security vulnerability

The kpasswd service provided by kadmind was vulnerable to a UDP ping-pong attack (CVE-2002-2443).

Record
MGASA-2013-0161
Updated
2026-11-02
OSVopenSUSE-SU-2024:10004-1 No score

krb5-1.15-1.1 on GA media

These are all security issues fixed in the krb5-1.15-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10004-1
Updated
2026-11-02
OSVUBUNTU-CVE-2002-2443 No score

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.

Record
UBUNTU-CVE-2002-2443
Updated
2026-11-02
OSVUSN-2810-1 No score

krb5 vulnerabilities

It was discovered that the Kerberos kpasswd service incorrectly handled certain UDP packets. A remote attacker could possibly use this issue to cause resource consumption, resulting in a denial of service. This issue only affected Ubuntu 12.04 LTS. (CVE-2002-2443)

It was discovered that Kerberos incorrectly handled null bytes in certain data fields. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-5355)

It was discovered that the Kerberos kdcpreauth modules incorrectly tracked certain client requests. A remote attacker could possibly use this issue to bypass intended preauthentication requirements. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-2694)

It was discovered that Kerberos incorrectly handled certain SPNEGO packets. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2015-2695)

It was discovered that Kerberos incorrectly handled certain IAKERB packets. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2015-2696, CVE-2015-2698)

It was discovered that Kerberos incorrectly handled certain TGS requests. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2015-2697)

Record
USN-2810-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
krb5
Debian:12
 before 1.10.1+dfsg-6
1.10.1+dfsg-6
krb5
Debian:13
 before 1.10.1+dfsg-6
1.10.1+dfsg-6
krb5
Debian:14
 before 1.10.1+dfsg-6
1.10.1+dfsg-6
krb5
Debian:6.0
 before 1.8.3+dfsg-4squeeze7, plus listed versions
1.8.3+dfsg-41.8.3+dfsg-4squeeze11.8.3+dfsg-4squeeze21.8.3+dfsg-4squeeze51.8.3+dfsg-4squeeze6
1.8.3+dfsg-4squeeze7
krb5
Debian:7
 before 1.10.1+dfsg-5+deb7u1, plus listed versions
1.10.1+dfsg-5
1.10.1+dfsg-5+deb7u1
krb5
Mageia:2
 before 1.9.2-2.6.mga2
1.9.2-2.6.mga2
krb5
Mageia:3
 before 1.11.1-1.2.mga3
1.11.1-1.2.mga3
krb5
Red Hat:enterprise_linux:5::server
 before 0:1.6.1-70.el5_9.2
0:1.6.1-70.el5_9.2
krb5-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:1.6.1-70.el5_9.2
0:1.6.1-70.el5_9.2
krb5-devel
Red Hat:enterprise_linux:5::server
 before 0:1.6.1-70.el5_9.2
0:1.6.1-70.el5_9.2
Show 38 moreShow less
Affected packages
PackageAffectedFixed
krb5-libs
Red Hat:enterprise_linux:5::server
 before 0:1.6.1-70.el5_9.2
0:1.6.1-70.el5_9.2
krb5-server
Red Hat:enterprise_linux:5::server
 before 0:1.6.1-70.el5_9.2
0:1.6.1-70.el5_9.2
krb5-server-ldap
Red Hat:enterprise_linux:5::server
 before 0:1.6.1-70.el5_9.2
0:1.6.1-70.el5_9.2
krb5-workstation
Red Hat:enterprise_linux:5::server
 before 0:1.6.1-70.el5_9.2
0:1.6.1-70.el5_9.2
krb5
Red Hat:enterprise_linux:6::client
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-debuginfo
Red Hat:enterprise_linux:6::client
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-libs
Red Hat:enterprise_linux:6::client
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-pkinit-openssl
Red Hat:enterprise_linux:6::client
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-workstation
Red Hat:enterprise_linux:6::client
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-devel
Red Hat:enterprise_linux:6::client
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-server
Red Hat:enterprise_linux:6::client
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-server-ldap
Red Hat:enterprise_linux:6::client
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5
Red Hat:enterprise_linux:6::computenode
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-libs
Red Hat:enterprise_linux:6::computenode
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-pkinit-openssl
Red Hat:enterprise_linux:6::computenode
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-workstation
Red Hat:enterprise_linux:6::computenode
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-devel
Red Hat:enterprise_linux:6::computenode
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-server
Red Hat:enterprise_linux:6::computenode
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-server-ldap
Red Hat:enterprise_linux:6::computenode
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5
Red Hat:enterprise_linux:6::server
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-debuginfo
Red Hat:enterprise_linux:6::server
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-devel
Red Hat:enterprise_linux:6::server
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-libs
Red Hat:enterprise_linux:6::server
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-pkinit-openssl
Red Hat:enterprise_linux:6::server
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-server
Red Hat:enterprise_linux:6::server
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-server-ldap
Red Hat:enterprise_linux:6::server
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-workstation
Red Hat:enterprise_linux:6::server
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5
Red Hat:enterprise_linux:6::workstation
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-devel
Red Hat:enterprise_linux:6::workstation
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-libs
Red Hat:enterprise_linux:6::workstation
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-pkinit-openssl
Red Hat:enterprise_linux:6::workstation
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-server
Red Hat:enterprise_linux:6::workstation
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-server-ldap
Red Hat:enterprise_linux:6::workstation
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5-workstation
Red Hat:enterprise_linux:6::workstation
 before 0:1.10.3-10.el6_4.3
0:1.10.3-10.el6_4.3
krb5
Ubuntu:14.04:LTS
From an advisory covering 7 CVEs
 before 1.12+dfsg-2ubuntu5.2, plus listed versions
1.10.1+dfsg-6.1ubuntu11.11.3+dfsg-3ubuntu21.12+dfsg-2ubuntu11.12+dfsg-2ubuntu21.12+dfsg-2ubuntu3
Show 4 moreShow less
1.12+dfsg-2ubuntu41.12+dfsg-2ubuntu4.21.12+dfsg-2ubuntu51.12+dfsg-2ubuntu5.1
1.12+dfsg-2ubuntu5.2
krb5
openSUSE:Tumbleweed
From an advisory covering 54 CVEs
 before 1.15-1.1
1.15-1.1

History

History
RecordedChangedSources
affected, facts
affected
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2002-2443 is a medium vulnerability (CVSS 5.0) in Mit Kerberos 5, published May 10, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 6.18%, the 93rd percentile. Fixed in krb5 1.10.1+dfsg-6.

References

Show 78 moreShow less
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