OpenSSL up to 0.9.8m Configuration File kssl_keytab_is_available input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

A vulnerability was found in OpenSSL up to 0.9.8m (Network Encryption Software) and classified as problematic. This issue affects the function kssl_keytab_is_available of the component Configuration File. The manipulation with an unknown input leads to a privilege escalation 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. The summary by CVE is:

The kssl_keytab_is_available function in ssl/kssl.c in OpenSSL before 0.9.8n, when Kerberos is enabled but Kerberos configuration files cannot be opened, does not check a certain return value, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via SSL cipher negotiation, as demonstrated by a chroot installation of Dovecot or stunnel without Kerberos configuration files inside the chroot.

The issue has been introduced in 07/05/2005. The weakness was shared 03/05/2010 (Website). It is possible to read the advisory at lists.balabit.com. The identification of this vulnerability is CVE-2010-0433. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 1704 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 45359 (OpenSSL < 0.9.8n Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Web Servers. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185029 (HP-UX Running OpenSSL Multiple Vulnerabilities (HPSBUX02517)).

Upgrading to version 0.9.8k eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (57188), Vulnerability Center (SBV-25180) and Tenable (45359). The entries 4377 and 51551 are related to this item.

Productinfo

Type

Name

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 45359
Nessus Name: OpenSSL < 0.9.8n Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 67216
OpenVAS Name: Slackware Advisory SSA:2010-090-01 openssl
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSSL 0.9.8k

Timelineinfo

07/05/2005 🔍
01/27/2010 +1666 days 🔍
03/03/2010 +35 days 🔍
03/05/2010 +2 days 🔍
03/05/2010 +0 days 🔍
03/05/2010 +0 days 🔍
03/26/2010 +21 days 🔍
03/29/2010 +3 days 🔍
03/19/2015 +1816 days 🔍
09/05/2021 +2362 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: lists.balabit.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-0433 (🔍)
OVAL: 🔍
IAVM: 🔍

X-Force: 57188
Vulnerability Center: 25180 - OpenSSL &lt;0.9.8n Remote DoS Vulnerability via SSL Cipher Negotiation, Medium
SecurityFocus: 38533 - OpenSSL 'dtls1_retrieve_buffered_fragment()' Remote Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 03/19/2015 12:22 PM
Updated: 09/05/2021 07:36 AM
Changes: (1) source_nessus_risk
Complete: 🔍

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