OpenLDAP up to 2.4.42 libraries/liblber/io.c ber_get_next BER input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3$0-$5k0.00

A vulnerability was found in OpenLDAP up to 2.4.42 (Directory Service Software). It has been rated as problematic. Affected by this issue is the function ber_get_next in the library libraries/liblber/io.c. The manipulation of the argument BER with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

The ber_get_next function in libraries/liblber/io.c in OpenLDAP 2.4.42 and earlier allows remote attackers to cause a denial of service (reachable assertion and application crash) via crafted BER data, as demonstrated by an attack against slapd.

The weakness was presented 09/11/2015 by Denis Andzakovic (Website). The advisory is available at openldap.org. This vulnerability is handled as CVE-2015-6908 since 09/11/2015. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 86355 (Amazon Linux AMI : openldap / compat-openldap (ALAS-2015-599)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168454 (OpenSuSE Security Update for openldap2 (openSUSE-SU-2016:0226-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 21155.

The vulnerability is also documented in the vulnerability database at Tenable (86355). See 79581 for similar entry.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 86355
Nessus Name: Amazon Linux AMI : openldap / compat-openldap (ALAS-2015-599)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703356
OpenVAS Name: Debian Security Advisory DSA 3356-1 (openldap - security update)
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: 6fe51a9ab04fd28bbc171da3cf12f1c1040d6629
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

09/10/2015 🔍
09/11/2015 +1 days 🔍
09/11/2015 +0 days 🔍
09/11/2015 +0 days 🔍
09/11/2015 +0 days 🔍
09/13/2015 +2 days 🔍
09/14/2015 +1 days 🔍
06/14/2022 +2465 days 🔍

Sourcesinfo

Advisory: RHSA-2015:1840
Researcher: Denis Andzakovic
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-6908 (🔍)
OVAL: 🔍

SecurityTracker: 1033534
Vulnerability Center: 52570 - OpenLDAP 2.4.42 and Earlier Remote DoS via Crafted BER Data, High
SecurityFocus: 76714 - OpenLDAP CVE-2015-6908 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 09/14/2015 10:20
Updated: 06/14/2022 23:17
Changes: 09/14/2015 10:20 (61), 12/19/2017 08:17 (17), 06/14/2022 22:51 (6), 06/14/2022 23:05 (1), 06/14/2022 23:17 (2)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!