OpenLDAP up to 2.1.19 UTF8StringNormalize numeric error

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in OpenLDAP up to 2.1.19. This impacts the function UTF8StringNormalize. This manipulation causes numeric error. This vulnerability appears as CVE-2011-4079. There is no available exploit.

Detailsinfo

A vulnerability has been found in OpenLDAP up to 2.1.19 (Directory Service Software) and classified as critical. Affected by this vulnerability is the function UTF8StringNormalize. The manipulation with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect availability. The summary by CVE is:

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.

The weakness was presented 10/27/2011 as Bug 749324 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2011-4079. The exploitation appears to be easy. The attack can be launched remotely. Required for exploitation is a single authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 56869 (Ubuntu 10.04 LTS / 10.10 / 11.04 / 11.10 : openldap vulnerability (USN-1266-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195211 (Ubuntu Security Notification for OpenLDAP Vulnerability (USN-1266-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (70991), Tenable (56869), SecurityFocus (BID 50384†) and Vulnerability Center (SBV-33877†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 56869
Nessus Name: Ubuntu 10.04 LTS / 10.10 / 11.04 / 11.10 : openldap vulnerability (USN-1266-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 840808
OpenVAS Name: Ubuntu Update for openldap USN-1266-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: 507238713b71208ec4f262f312cb495a302df9e9

Timelineinfo

10/18/2011 🔍
10/27/2011 +9 days 🔍
10/27/2011 +0 days 🔍
10/27/2011 +0 days 🔍
11/18/2011 +22 days 🔍
11/20/2011 +2 days 🔍
03/23/2015 +1219 days 🔍
01/05/2025 +3576 days 🔍

Sourcesinfo

Advisory: Bug 749324
Status: Confirmed

CVE: CVE-2011-4079 (🔍)
GCVE (CVE): GCVE-0-2011-4079
GCVE (VulDB): GCVE-100-59233

OVAL: 🔍

X-Force: 70991
SecurityFocus: 50384
Secunia: 46599
Vulnerability Center: 33877 - OpenLDAP 2.4.26 UTF8StringNormalize Off-by-one Error Remote Denial of Service Vulnerability, High

Entryinfo

Created: 03/23/2015 16:50
Updated: 01/05/2025 20:55
Changes: 03/23/2015 16:50 (59), 04/05/2017 14:51 (7), 11/24/2021 20:29 (6), 11/24/2021 20:37 (1), 01/05/2025 20:55 (22)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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