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NVD / CVE Program· CNA certcc

CVE-2010-0211: 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

Noroxi assessment

Priority: Plan (action score 48/100)

  • Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 28.4% (FIRST EPSS); higher than 98.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: openldap (Debian:12) 2.4.23-1; openldap (Debian:5.0) 2.4.11-1+lenny2; compat-openldap (Red Hat:enterprise_linux:4::as) 0:2.1.30-12.el4_8.3.

Add it to your regular patch cycle. Upgrade to openldap (Debian:12) 2.4.23-1; openldap (Debian:5.0) 2.4.11-1+lenny2; compat-openldap (Red Hat:enterprise_linux:4::as) 0:2.1.30-12.el4_8.3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

CriticalCVSS 9.8 · v3.1—Proof of concept Fix available
Published
Jul 28, 2010
Updated
Jun 16, 2026
EPSS
28.4% · 98th percentile

Report tools

JSON

Action score

48

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
9 / 30 · 28.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
openldapopenldap
vmwareesxi
opensuseopensuse
applemac os x
applemac os x server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apple mac os x10.6.0 and later · before 10.6.5
  • apple mac os x server10.6.0 and later · before 10.6.5
  • openldap openldap2.4.22
  • opensuse opensuse11.0
  • vmware esxi4.0
  • vmware esxi4.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12openldapbefore 2.4.23-12.4.23-1
Debian:5.0openldapbefore 2.4.11-1+lenny22.4.11-1+lenny2
Red Hat:enterprise_linux:4::ascompat-openldapbefore 0:2.1.30-12.el4_8.30:2.1.30-12.el4_8.3
Red Hat:enterprise_linux:4::asopenldapbefore 0:2.2.13-12.el4_8.30:2.2.13-12.el4_8.3
Red Hat:enterprise_linux:4::asopenldap-clientsbefore 0:2.2.13-12.el4_8.30:2.2.13-12.el4_8.3
Red Hat:enterprise_linux:4::asopenldap-debuginfobefore 0:2.2.13-12.el4_8.30:2.2.13-12.el4_8.3
Red Hat:enterprise_linux:4::asopenldap-develbefore 0:2.2.13-12.el4_8.30:2.2.13-12.el4_8.3
Red Hat:enterprise_linux:4::asopenldap-serversbefore 0:2.2.13-12.el4_8.30:2.2.13-12.el4_8.3
Red Hat:enterprise_linux:4::asopenldap-servers-sqlbefore 0:2.2.13-12.el4_8.30:2.2.13-12.el4_8.3
Red Hat:enterprise_linux:5::clientcompat-openldapbefore 0:2.3.43_2.2.29-12.el5_5.10:2.3.43_2.2.29-12.el5_5.1
Red Hat:enterprise_linux:5::clientopenldap-clientsbefore 0:2.3.43-12.el5_5.10:2.3.43-12.el5_5.1
Red Hat:enterprise_linux:5::client_workstationopenldapbefore 0:2.3.43-12.el5_5.10:2.3.43-12.el5_5.1
Red Hat:enterprise_linux:5::client_workstationopenldap-debuginfobefore 0:2.3.43-12.el5_5.10:2.3.43-12.el5_5.1
Red Hat:enterprise_linux:5::client_workstationopenldap-develbefore 0:2.3.43-12.el5_5.10:2.3.43-12.el5_5.1
Red Hat:enterprise_linux:5::client_workstationopenldap-serversbefore 0:2.3.43-12.el5_5.10:2.3.43-12.el5_5.1
Red Hat:enterprise_linux:5::client_workstationopenldap-servers-overlaysbefore 0:2.3.43-12.el5_5.10:2.3.43-12.el5_5.1
Red Hat:enterprise_linux:5::client_workstationopenldap-servers-sqlbefore 0:2.3.43-12.el5_5.10:2.3.43-12.el5_5.1

Same product

openldap: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-29155In OpenLDAP 2.x before 2.5.12 and 2.6.x before 2.6.2, a SQL injection vulnerability exists in the experimental back-sql backend to slapd, vi
    58Plan
  • CVE-2020-36228An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, r
    55Plan
  • CVE-2020-36221An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, result
    55Plan

Published before and after this one in the same product

  • ← EarlierCVE-2008-2952Jul 1, 2008 · liblber/io.c in OpenLDAP 2.2.4 to 2.4.10 allows remote attackers to cause a denial of service (program termination) via crafted ASN.1 BER da
    24Monitor
  • ← EarlierCVE-2009-3767Oct 23, 2009 · libraries/libldap/tls_o.c in OpenLDAP 2.2 and 2.4, and possibly other versions, when OpenSSL is used, does not properly handle a '\0' charac
    18Monitor
  • Later →CVE-2010-0212Jul 28, 2010 · OpenLDAP 2.4.22 allows remote attackers to cause a denial of service (crash) via a modrdn call with a zero-length RDN destination string, wh
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:openldap2.4.23-1 · Debian:12Package registry (OSV)
red hat:compat-openldap0:2.3.43_2.2.29-12.el5_5.1 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:openldap0:2.3.43-12.el5_5.1 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:openldap-clients0:2.3.43-12.el5_5.1 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:openldap-debuginfo0:2.3.43-12.el5_5.1 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:openldap-devel0:2.3.43-12.el5_5.1 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:openldap-servers0:2.3.43-12.el5_5.1 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:openldap-servers-overlays0:2.3.43-12.el5_5.1 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:openldap-servers-sql0:2.3.43-12.el5_5.1 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrydos2010-07-19

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-9 d
  2. Published
  3. TodayOct 28, 2026+5936 d
EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-252 · Unchecked Return Value

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (16 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records