medium
5
CWE
20
Advisory Published
CVE Published
Updated

CVE-2002-2443: Input Validation

First published: Mon May 13 2013(Updated: )

A flaw in certain programs that handle UDP traffic was discovered and assigned the name <a href="https://access.redhat.com/security/cve/CVE-1999-0103">CVE-1999-0103</a> (that CVE specifically mentions echo and chargen as vulnerable). In 2002, a Nessus plugin was included [1] that reference this CVE name, but was for the kpasswd service. Until recently, this issue had not been reported upstream. This issue has since been reported upstream [2] and is now fixed [3]. If a malicious remote user were to spoof their IP address to that of another server running kadmind with the password change port (kpasswd, port 464), or to the target server's IP address itself), kpasswd will pass UDP packets to the spoofed address and reply each time. This can be used to consume bandwidth and CPU on the affected servers running kadmind. This should be fixed in the for krb5-1.11.3 release. [1] <a href="http://marc.info/?l=nessus&amp;m=102418951803893&amp;w=2">http://marc.info/?l=nessus&amp;m=102418951803893&amp;w=2</a> [2] <a href="http://krbdev.mit.edu/rt/Ticket/Display.html?id=7637">http://krbdev.mit.edu/rt/Ticket/Display.html?id=7637</a> [3] <a href="https://github.com/krb5/krb5/commit/cf1a0c411b2668c57c41e9c4efd15ba17b6b322c">https://github.com/krb5/krb5/commit/cf1a0c411b2668c57c41e9c4efd15ba17b6b322c</a>

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
MIT Kerberos 5<1.11.3
openSUSE=12.3
openSUSE=11.4
openSUSE=12.2
Fedoraproject Fedora=17
Fedoraproject Fedora=18
Fedoraproject Fedora=19
redhat enterprise Linux server=5.0
redhat enterprise Linux workstation=5.0
redhat enterprise Linux server aus=6.4
redhat enterprise Linux desktop=6.0
redhat enterprise Linux server=6.0
redhat enterprise Linux workstation=6.0
redhat enterprise Linux desktop=5.0
redhat enterprise Linux eus=5.9
redhat enterprise Linux eus=6.4
Debian GNU/Linux=8.0
Debian GNU/Linux=7.0
Debian GNU/Linux=6.0
Ubuntu Linux=15.10
Ubuntu Linux=15.04
Ubuntu Linux=14.04
Ubuntu Linux=12.04

Remedy

https://github.com/krb5/krb5/commit/cf1a0c411b2668c57c41e9c4efd15ba17b6b322c

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2002-2443?

    CVE-2002-2443 is considered a moderate severity vulnerability that affects various implementations of UDP traffic handling.

  • How do I fix CVE-2002-2443?

    To fix CVE-2002-2443, ensure that you update your vulnerable software packages to the latest versions that contain the security fixes.

  • Which software is affected by CVE-2002-2443?

    CVE-2002-2443 affects several software, including MIT Kerberos 5, various versions of openSUSE, Fedora, Red Hat Enterprise Linux, and Debian.

  • Is CVE-2002-2443 exploitable remotely?

    Yes, CVE-2002-2443 can be exploited remotely due to its impact on how UDP traffic is handled by affected software.

  • What can happen if CVE-2002-2443 is exploited?

    Exploitation of CVE-2002-2443 may lead to denial of service or potentially allow an attacker to perform arbitrary code execution.

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