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[ GLSA 200803-28 ] OpenLDAP: Denial of Service vulnerabilities
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PostPosted: Wed Mar 19, 2008 10:26 pm    Post subject: [ GLSA 200803-28 ] OpenLDAP: Denial of Service vulnerabiliti Reply with quote

Gentoo Linux Security Advisory

Title: OpenLDAP: Denial of Service vulnerabilities (GLSA 200803-28)
Severity: normal
Exploitable: remote
Date: March 19, 2008
Bug(s): #197446, #209677
ID: 200803-28

Synopsis

Multiple Denial of Service vulnerabilities have been reported in OpenLDAP.

Background

OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.

Affected Packages

Package: net-nds/openldap
Vulnerable: < 2.3.41
Unaffected: >= 2.3.41
Architectures: All supported architectures


Description

The following errors have been discovered in OpenLDAP:
  • Tony Blake discovered an error which exists within the normalisation of "objectClasses" (CVE-2007-5707).
  • Thomas Sesselmann reported that, when running as a proxy-caching server the "add_filter_attrs()" function in servers/slapd/overlay/pcache.c does not correctly NULL terminate "new_attrs" (CVE-2007-5708).
  • A double-free bug exists in attrs_free() in the file servers/slapd/back-bdb/modrdn.c, which was discovered by Jonathan Clarke (CVE-2008-0658).


Impact

A remote attacker can cause a Denial of Serivce by sending a malformed "objectClasses" attribute, and via unknown vectors that prevent the "new_attrs" array from being NULL terminated, and via a modrdn operation with a NOOP (LDAP_X_NO_OPERATION) control.

Workaround

There is no known workaround at this time.

Resolution

All OpenLDAP users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-nds/openldap-2.3.41"


References

CVE-2007-5707
CVE-2007-5708
CVE-2008-0658
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