CVE-2011-4079

NameCVE-2011-4079
DescriptionOff-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs647610

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openldap (PTS)stretch2.4.44+dfsg-5+deb9u3fixed
stretch (security)2.4.44+dfsg-5+deb9u4fixed
buster, buster (security)2.4.47+dfsg-3+deb10u2fixed
bullseye, sid2.4.50+dfsg-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
openldapsource(unstable)2.4.28-1unimportant647610

Notes

Not exploitable with glibc, see
http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4079

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