OpenLDAP up to 2.3.x LDAP Authentication krbv4_ldap_auth Long Credentials memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.12

Summaryinfo

A vulnerability, which was classified as critical, has been found in OpenLDAP up to 2.3.x. The affected element is the function krbv4_ldap_auth of the component LDAP Authentication. Performing a manipulation as part of Long Credentials results in memory corruption. This vulnerability is known as CVE-2006-6493. Furthermore, an exploit is available. It is preferable to disable the affected component.

Detailsinfo

A vulnerability classified as critical has been found in OpenLDAP up to 2.3.x (Directory Service Software). This affects the function krbv4_ldap_auth of the component LDAP Authentication. The manipulation as part of a Long Credentials leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in the krbv4_ldap_auth function in servers/slapd/kerberos.c in OpenLDAP 2.4.3 and earlier, when OpenLDAP is compiled with the --enable-kbind (Kerberos KBIND) option, allows remote attackers to execute arbitrary code via an LDAP bind request using the LDAP_AUTH_KRBV41 authentication method and long credential data.

The weakness was published 12/13/2006 by Solar Eclipse (Website). The advisory is shared at phreedom.org. This vulnerability is uniquely identified as CVE-2006-6493 since 12/12/2006. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

A public exploit has been developed by Solar Eclipse in C and been published 2 days after the advisory. The exploit is shared for download at phreedom.org. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at openldap.org.

The vulnerability is also documented in the databases at Exploit-DB (2933), OSVDB (31522†) and Secunia (SA23334†). 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: 7.3
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Solar Eclipse
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Disable
Status: 🔍

Exploit Delay Time: 🔍

Patch: openldap.org

Timelineinfo

12/12/2006 🔍
12/12/2006 +0 days 🔍
12/13/2006 +1 days 🔍
12/13/2006 +0 days 🔍
12/13/2006 +0 days 🔍
12/15/2006 +1 days 🔍
12/15/2006 +0 days 🔍
12/15/2006 +0 days 🔍
06/29/2024 +6406 days 🔍

Sourcesinfo

Advisory: phreedom.org
Researcher: Solar Eclipse
Status: Confirmed

CVE: CVE-2006-6493 (🔍)
GCVE (CVE): GCVE-0-2006-6493
GCVE (VulDB): GCVE-100-2745
Secunia: 23334 - OpenLDAP "krbv4_ldap_auth()" Buffer Overflow Vulnerability, Moderately Critical
OSVDB: 31522 - OpenLDAP kbind krbv4_ldap_auth() Function Remote Overflow
SecuriTeam: securiteam.com
Vupen: ADV-2006-4964

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/15/2006 09:53
Updated: 06/29/2024 12:24
Changes: 12/15/2006 09:53 (68), 04/22/2018 13:20 (10), 06/29/2024 12:24 (16)
Complete: 🔍
Cache ID: 216:4CD:103

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

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