medium
6.5
CWE
476
Advisory Published
CVE Published
Updated

CVE-2018-5729: Null Pointer Dereference

First published: Thu Mar 01 2018(Updated: )

A flaw was found in MIT krb5 1.6 or later, an authenticated kadmin user with permission to add principals to an LDAP Kerberos database can cause a null dereference in kadmind, or circumvent a DN container check, by supplying tagged data intended to be internal to the database module. Reference: <a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891869">https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891869</a> Upstream patch: <a href="https://github.com/krb5/krb5/commit/e1caf6fb74981da62039846931ebdffed71309d1">https://github.com/krb5/krb5/commit/e1caf6fb74981da62039846931ebdffed71309d1</a>

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/krb5<=1.7dfsg~beta1-1<=1.16-2
debian/krb5
1.18.3-6+deb11u5
1.20.1-2+deb12u2
1.21.3-3
Kerberos 5 (libkrb5)>=5-1.6<5-1.21.2
Fedora=26
Fedora=27
Debian=8.0
Debian=9.0
redhat enterprise Linux desktop=7.0
redhat enterprise Linux server=7.0
redhat enterprise Linux workstation=7.0
Kerberos 5 (libkrb5)>=5-1.6

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1551083

Remedy

https://github.com/krb5/krb5/commit/e1caf6fb74981da62039846931ebdffed71309d1

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2018-5729.

  • What is the severity level of CVE-2018-5729?

    CVE-2018-5729 has a severity level of 4.7 (high).

  • Which software versions are affected by CVE-2018-5729?

    MIT krb5 1.6 or later versions are affected by CVE-2018-5729.

  • How can an attacker exploit CVE-2018-5729?

    An authenticated kadmin with permission to add principals to an LDAP Kerberos database can cause a denial of service (NULL pointer dereference) or bypass a DN container check by supplying tagged data that is internal to the database module.

  • Are there any official references for CVE-2018-5729?

    Yes, you can find official references for CVE-2018-5729 at the following links: http://www.securitytracker.com/id/1042071, https://access.redhat.com/errata/RHBA-2019:0327, https://access.redhat.com/errata/RHSA-2018:3071.

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