| Name | CVE-2011-4079 |
| Description | Off-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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 647610 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openldap (PTS) | jessie, jessie (lts) | 2.4.40+dfsg-1+deb8u11 | fixed |
| stretch (security), stretch (lts), stretch | 2.4.44+dfsg-5+deb9u9 | fixed |
| buster, buster (security) | 2.4.47+dfsg-3+deb10u7 | fixed |
| bullseye (security), bullseye | 2.4.57+dfsg-3+deb11u1 | fixed |
| sid, trixie, bookworm | 2.5.13+dfsg-5 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| openldap | source | (unstable) | 2.4.28-1 | unimportant | | 647610 |
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