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Fencer Intel
medium 5.0

CVE-2011-1081 json

modrdn.c in slapd in OpenLDAP 2.4.x before 2.4.24 allows remote attackers to cause a denial of service (daemon crash) via a relative Distin…

published 2011-03-20 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1096

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
14.5%
EPSS 14.5% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

modrdn.c in slapd in OpenLDAP 2.4.x before 2.4.24 allows remote attackers to cause a denial of service (daemon crash) via a relative Distinguished Name (DN) modification request (aka MODRDN operation) that contains an empty value for the OldDN field.

Patch / fix

  • openldap Debian 14, Debian 13, Debian 12 2.4.25-1

debian advisories DEBIAN-CVE-2011-1081

  • openldap RHEL 6 2.4.19-15.el6_0.2
  • compat-openldap RHEL 6 2.4.19_2.3.43-15.el6_0.2
  • openldap-clients RHEL 6 2.4.19-15.el6_0.2
  • openldap-servers RHEL 6 2.4.19-15.el6_0.2
  • openldap-servers-sql RHEL 6 2.4.19-15.el6_0.2

red hat advisories RHSA-2011:0347

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-1081 updated cvss 5.0

openldap: DoS when submitting special MODRDN request

  • Red Hat Enterprise Linux Desktop (v. 6) openldap 2.4.19-15.el6_0.2, openldap-clients 2.4.19-15.el6_0.2, compat-openldap 2.4.19_2.3.43-15.el6_0.2 Red Hat Enterprise Linux Desktop Optional (v. 6) openldap 2.4.19-15.el6_0.2, openldap-servers 2.4.19-15.el6_0.2, openldap-servers-sql 2.4.19-15.el6_0.2 Red Hat Enterprise Linux HPC Node (v. 6) openldap 2.4.19-15.el6_0.2, compat-openldap 2.4.19_2.3.43-15.el6_0.2 Red Hat Enterprise Linux HPC Node Optional (v. 6) openldap 2.4.19-15.el6_0.2, openldap-clients 2.4.19-15.el6_0.2, openldap-servers 2.4.19-15.el6_0.2, openldap-servers-sql 2.4.19-15.el6_0.2 Red Hat Enterprise Linux Server (v. 6) openldap 2.4.19-15.el6_0.2, openldap-clients 2.4.19-15.el6_0.2, openldap-servers 2.4.19-15.el6_0.2, compat-openldap 2.4.19_2.3.43-15.el6_0.2 Red Hat Enterprise Linux Server Optional (v. 6) openldap 2.4.19-15.el6_0.2, openldap-servers-sql 2.4.19-15.el6_0.2
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) openldap 2.4.19-15.el6_0.2, openldap-clients 2.4.19-15.el6_0.2, openldap-servers 2.4.19-15.el6_0.2, compat-openldap 2.4.19_2.3.43-15.el6_0.2 Red Hat Enterprise Linux Workstation Optional (v. 6) openldap 2.4.19-15.el6_0.2, openldap-servers-sql 2.4.19-15.el6_0.2
    fixed: vendor fix RHSA-2011:0347
  • Red Hat Enterprise Linux 4 openldap Red Hat Enterprise Linux 5 openldap
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-35445)
  2. Published

Exploit prediction

14.47% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-35445 OpenLDAP 2.4.x - 'modrdn' NULL OldDN Remote Denial of Service dos, 2011-01-03
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=680975 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.