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Fencer Intel
critical 9.8

CVE-2010-0211 in the critical feed json

The slap_modrdn2mods function in modrdn.c in OpenLDAP 2.4.22 does not check the return value of a call to the smr_normalize function, which…

published 16y ago modified 4mo ago also EUVD-2010-0242

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
28.5%
EPSS 28.5% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

The slap_modrdn2mods function in modrdn.c in OpenLDAP 2.4.22 does not check the return value of a call to the smr_normalize function, which allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a modrdn call with an RDN string containing invalid UTF-8 sequences, which triggers a free of an invalid, uninitialized pointer in the slap_mods_free function, as demonstrated using the Codenomicon LDAPv3 test suite.

Patch / fix

  • apple mac_os_x 10.6.5
  • apple mac_os_x_server 10.6.5
  • openldap Debian 14, Debian 13, Debian 12 2.4.23-1

debian advisories DEBIAN-CVE-2010-0211

  • openldap RHEL 4 2.2.13-12.el4_8.3
  • compat-openldap RHEL 4 2.1.30-12.el4_8.3
  • openldap-clients RHEL 4 2.2.13-12.el4_8.3
  • openldap-servers RHEL 4 2.2.13-12.el4_8.3
  • openldap-servers-sql RHEL 4 2.2.13-12.el4_8.3
  • openldap RHEL 5 2.3.43-12.el5_5.1
  • compat-openldap RHEL 5 2.3.43_2.2.29-12.el5_5.1
  • openldap-clients RHEL 5 2.3.43-12.el5_5.1

red hat advisories RHSA-2010:0543RHSA-2010:0542

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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-2010-0211 updated cvss 5.0

openldap: modrdn processing uninitialized pointer free

  • Red Hat Enterprise Linux (v. 5 server) openldap 2.3.43-12.el5_5.1, openldap-clients 2.3.43-12.el5_5.1, openldap-servers 2.3.43-12.el5_5.1, openldap-servers-sql 2.3.43-12.el5_5.1, compat-openldap 2.3.43_2.2.29-12.el5_5.1, openldap-servers-overlays 2.3.43-12.el5_5.1
    fixed: vendor fix RHSA-2010:0542
  • Red Hat Enterprise Linux AS version 4 openldap 2.2.13-12.el4_8.3, compat-openldap 2.1.30-12.el4_8.3, openldap-clients 2.2.13-12.el4_8.3, openldap-servers 2.2.13-12.el4_8.3, openldap-servers-sql 2.2.13-12.el4_8.3
    fixed: vendor fix RHSA-2010:0543
  • Red Hat Enterprise Linux Desktop (v. 5 client) openldap 2.3.43-12.el5_5.1, openldap-clients 2.3.43-12.el5_5.1, compat-openldap 2.3.43_2.2.29-12.el5_5.1
    fixed: vendor fix RHSA-2010:0542
  • Red Hat Enterprise Linux Desktop version 4 openldap 2.2.13-12.el4_8.3, compat-openldap 2.1.30-12.el4_8.3, openldap-clients 2.2.13-12.el4_8.3, openldap-servers 2.2.13-12.el4_8.3, openldap-servers-sql 2.2.13-12.el4_8.3
    fixed: vendor fix RHSA-2010:0543
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) openldap 2.3.43-12.el5_5.1, openldap-servers 2.3.43-12.el5_5.1, openldap-servers-sql 2.3.43-12.el5_5.1, openldap-servers-overlays 2.3.43-12.el5_5.1
    fixed: vendor fix RHSA-2010:0542
  • Red Hat Enterprise Linux ES version 4 openldap 2.2.13-12.el4_8.3, compat-openldap 2.1.30-12.el4_8.3, openldap-clients 2.2.13-12.el4_8.3, openldap-servers 2.2.13-12.el4_8.3, openldap-servers-sql 2.2.13-12.el4_8.3 Red Hat Enterprise Linux WS version 4 openldap 2.2.13-12.el4_8.3, compat-openldap 2.1.30-12.el4_8.3, openldap-clients 2.2.13-12.el4_8.3, openldap-servers 2.2.13-12.el4_8.3, openldap-servers-sql 2.2.13-12.el4_8.3
    fixed: vendor fix RHSA-2010:0543
  • Red Hat Enterprise Linux 6 openldap, compat-openldap, openldap-clients, openldap-servers, openldap-servers-sql
    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-34348)
  2. Published

Exploit prediction

28.47% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-34348 OpenLDAP 2.4.22 - 'modrdn' Multiple Vulnerabilities dos, 2010-07-19
  • securityfocus.com http://www.securityfocus.com/bid/41770 referenced PoC, tagged "exploit" by a source, unverified
  • openldap.org http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6570 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
Technology feeds

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.