medium
4
CWE
189 119
Advisory Published
CVE Published
Updated

CVE-2011-4079: Buffer Overflow

First published: Wed Oct 26 2011(Updated: )

A bug in slapd's UTF8StringNormalize() function can cause a one-byte buffer overflow when it is passed a zero-length string. The code then writes a '\0' past the one-byte long buffer allocated on the heap, which could possibly allow a remote authenticated user to crash slapd. As per the upstream report [1], this bug has been present since 2003-04-07 [2] so should affect all versions of openldap we currently ship. A patch to correct the flaw has been committed [3] (depends on the previous patch [4]). [1] <a href="http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059">http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059</a> [2] <a href="http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=67d6b23d">http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=67d6b23d</a> [3] <a href="http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=507238713b71208ec4f262f312cb495a302df9e9">http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=507238713b71208ec4f262f312cb495a302df9e9</a> [4] <a href="http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=d0dd8616f1c68a868afeb8c2c5c09969e366e2c0">http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=d0dd8616f1c68a868afeb8c2c5c09969e366e2c0</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
OpenLDAP=2.0.2
OpenLDAP=2.0.11_11
OpenLDAP=2.1.15
OpenLDAP=2.1.10
OpenLDAP=2.3.5
OpenLDAP=2.2.4
OpenLDAP=2.2.22
OpenLDAP=2.3.31
OpenLDAP=2.3.42
OpenLDAP=2.1.29
OpenLDAP=2.2.18
OpenLDAP=2.1.9
OpenLDAP=1.2.6
OpenLDAP=1.1.2
OpenLDAP=2.0.22
OpenLDAP=2.4.17
OpenLDAP=2.4.6
OpenLDAP=2.0.9
OpenLDAP=2.2.0
OpenLDAP=2.3.32
OpenLDAP=2.1.19
OpenLDAP=1.0
OpenLDAP=1.2.7
OpenLDAP=2.2.12
OpenLDAP=2.2.20
OpenLDAP=2.4.11
OpenLDAP=2.0.15
OpenLDAP=2.2.13
OpenLDAP=2.1.30
OpenLDAP=2.0.26
OpenLDAP=2.1.5
OpenLDAP=2.1.14
OpenLDAP=2.1.21
OpenLDAP=1.0.2
OpenLDAP=2.3.41
OpenLDAP=2.4.8
OpenLDAP=2.1.24
OpenLDAP=2.3.17
OpenLDAP=2.1.20
OpenLDAP=2.0.14
OpenLDAP=2.0.7
OpenLDAP=1.2.11
OpenLDAP=1.1.0
OpenLDAP=2.0.13
OpenLDAP=2.0.27
OpenLDAP=2.0.11_9
OpenLDAP=2.3.12
OpenLDAP=2.2.9
OpenLDAP=2.1.26
OpenLDAP=2.3.8
OpenLDAP=2.2.27
OpenLDAP=2.3.27
OpenLDAP=2.3.36
OpenLDAP=2.3.39
OpenLDAP=2.3.43
OpenLDAP=2.3.20
OpenLDAP=2.1.17
OpenLDAP=2.3.40
OpenLDAP=2.3.13
OpenLDAP=2.4.9
OpenLDAP=2.1.2
OpenLDAP=2.2.14
OpenLDAP=2.1.6
OpenLDAP=2.4.16
OpenLDAP=2.0.3
OpenLDAP=2.4.3
OpenLDAP=2.3.38
OpenLDAP=2.3.14
OpenLDAP=2.2.10
OpenLDAP=2.2.7
OpenLDAP=1.2.12
OpenLDAP=2.0.25
OpenLDAP=2.1.12
OpenLDAP=2.4.22
OpenLDAP=2.0.12
OpenLDAP=2.4.25
OpenLDAP=2.1_.20
OpenLDAP=2.2.24
OpenLDAP=2.3.10
OpenLDAP=2.3.26
OpenLDAP=1.2.1
OpenLDAP=1.1.4
OpenLDAP=1.1
OpenLDAP=1.2.10
OpenLDAP=2.0.24
OpenLDAP=1.1.1
OpenLDAP=2.0.20
OpenLDAP=1.2.2
OpenLDAP=2.3.6
OpenLDAP=2.3.30
OpenLDAP=2.4.20
OpenLDAP=1.0.1
OpenLDAP=1.2.4
OpenLDAP=2.0.4
OpenLDAP=2.4.15
OpenLDAP=2.0.16
OpenLDAP=2.2.5
OpenLDAP=2.3.18
OpenLDAP=2.2.6
OpenLDAP=2.1.25
OpenLDAP=2.3.9
OpenLDAP=2.3.7
OpenLDAP=2.3.24
OpenLDAP=2.4.18
OpenLDAP=1.2.8
OpenLDAP=2.1.27
OpenLDAP<=2.4.26
OpenLDAP=2.3.21
OpenLDAP=2.0.11_11s
OpenLDAP=1.2.9
OpenLDAP=2.0.19
OpenLDAP=2.3.15
OpenLDAP=2.2.21
OpenLDAP=2.1.8
OpenLDAP=2.2.1
OpenLDAP=1.2.13
OpenLDAP=2.4.7
OpenLDAP=2.3.33
OpenLDAP=2.0.10
OpenLDAP=2.1.7
OpenLDAP=2.0.1
OpenLDAP=2.4.23
OpenLDAP=2.4.24
OpenLDAP=2.2.15
OpenLDAP=2.0
OpenLDAP=2.3.29
OpenLDAP=2.0.23
OpenLDAP=1.2.5
OpenLDAP=2.2.11
OpenLDAP=1.0.3
OpenLDAP=2.2.17
OpenLDAP=2.1.3
OpenLDAP=2.3.25
OpenLDAP=2.2.23
OpenLDAP=2.3.19
OpenLDAP=2.3.35
OpenLDAP=2.1.11
OpenLDAP=2.0.8
OpenLDAP=2.1.13
OpenLDAP=2.2.25
OpenLDAP=2.1.23
OpenLDAP=2.4.14
OpenLDAP=2.4.19
OpenLDAP=2.0.18
OpenLDAP=1.2
OpenLDAP=2.4.12
OpenLDAP=2.1.16
OpenLDAP=2.4.21
OpenLDAP=2.1.28
OpenLDAP=2.1.22
OpenLDAP=2.3.28
OpenLDAP=2.0.5
OpenLDAP=2.3.11
OpenLDAP=2.2.8
OpenLDAP=2.3.37
OpenLDAP=2.4.13
OpenLDAP=2.3.23
OpenLDAP=1.1.3
OpenLDAP=2.0.11
OpenLDAP=2.4.10
OpenLDAP=2.2.26
OpenLDAP=2.0.6
OpenLDAP=2.3.16
OpenLDAP=2.3.22
OpenLDAP=2.0.17
OpenLDAP=2.2.19
OpenLDAP=2.3.34
OpenLDAP=2.1.4
OpenLDAP=1.2.3
OpenLDAP=2.1.18
OpenLDAP=2.2.16
OpenLDAP=2.0.0
OpenLDAP=2.0.21
OpenLDAP=2.3.4
OpenLDAP=1.2.0

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=749324

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-4079?

    The severity of CVE-2011-4079 is classified as high due to the potential for crashing the OpenLDAP server.

  • How do I fix CVE-2011-4079?

    Fix CVE-2011-4079 by upgrading to a patched version of OpenLDAP that resolves the buffer overflow vulnerability.

  • Who is affected by CVE-2011-4079?

    CVE-2011-4079 affects certain versions of OpenLDAP including releases from 1.0 to 2.4.26.

  • What is the impact of CVE-2011-4079 on affected systems?

    The impact of CVE-2011-4079 can lead to a crash of the OpenLDAP server when an authenticated user sends a zero-length string.

  • Is CVE-2011-4079 targeted at remote users?

    Yes, CVE-2011-4079 can be exploited by remote authenticated users to trigger the vulnerability.

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