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Vulnerability record · CVE-2010-0211 · published 28 July 2010

CVE-2010-0211: Openldap unchecked return value vulnerability

Openldap · Openldap

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.

9.8 CVSS 3.1 Critical EPSS 28% · top 1.9% CWE-252 · Unchecked return value
9.8CVSS 3.1 base score, v2 5.0
28%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
38References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705 Third Party Advisory
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html Mailing List
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html Mailing List
http://secunia.com/advisories/40639 Broken LinkVendor Advisory
http://secunia.com/advisories/40677 Broken LinkVendor Advisory
http://secunia.com/advisories/40687 Broken LinkVendor Advisory
http://secunia.com/advisories/42787 Broken Link
http://security.gentoo.org/glsa/glsa-201406-36.xml Third Party Advisory
http://support.apple.com/kb/HT4435 Issue Tracking
http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6570 Exploit
http://www.redhat.com/support/errata/RHSA-2010-0542.html Broken Link
http://www.redhat.com/support/errata/RHSA-2010-0543.html Broken Link
http://www.securityfocus.com/archive/1/515545/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/41770 Broken LinkExploitPatchThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1024221 Broken LinkThird Party AdvisoryVDB Entry
http://www.vmware.com/security/advisories/VMSA-2011-0001.html Third Party Advisory
http://www.vupen.com/english/advisories/2010/1849 Broken LinkVendor Advisory
http://www.vupen.com/english/advisories/2010/1858 Broken LinkVendor Advisory
http://www.vupen.com/english/advisories/2011/0025 Broken Link
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705 Third Party Advisory
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html Mailing List
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html Mailing List
http://secunia.com/advisories/40639 Broken LinkVendor Advisory
http://secunia.com/advisories/40677 Broken LinkVendor Advisory
http://secunia.com/advisories/40687 Broken LinkVendor Advisory
http://secunia.com/advisories/42787 Broken Link
http://security.gentoo.org/glsa/glsa-201406-36.xml Third Party Advisory
http://support.apple.com/kb/HT4435 Issue Tracking
http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6570 Exploit
http://www.redhat.com/support/errata/RHSA-2010-0542.html Broken Link
http://www.redhat.com/support/errata/RHSA-2010-0543.html Broken Link
http://www.securityfocus.com/archive/1/515545/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/41770 Broken LinkExploitPatchThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1024221 Broken LinkThird Party AdvisoryVDB Entry
http://www.vmware.com/security/advisories/VMSA-2011-0001.html Third Party Advisory
http://www.vupen.com/english/advisories/2010/1849 Broken LinkVendor Advisory
http://www.vupen.com/english/advisories/2010/1858 Broken LinkVendor Advisory
http://www.vupen.com/english/advisories/2011/0025 Broken Link

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Source: NIST National Vulnerability Database (record CVE-2010-0211), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.