Linux Kernel 0.99.7.0 PAM _unix_verify_password security check

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel 0.99.7.0 and classified as critical. This affects the function _unix_verify_password of the component PAM. The manipulation leads to security check. This vulnerability is listed as CVE-2007-0003. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel 0.99.7.0 (Operating System). This issue affects the function _unix_verify_password of the component PAM. The manipulation with an unknown input leads to a security check vulnerability. Using CWE to declare the problem leads to CWE-358. The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique. Impacted is confidentiality, and integrity. The summary by CVE is:

pam_unix.so in Linux-PAM 0.99.7.0 allows context-dependent attackers to log into accounts whose password hash, as stored in /etc/passwd or /etc/shadow, has only two characters.

The bug was discovered 01/23/2007. The weakness was presented 01/24/2007 by Bernardo Innocenti (Website). The advisory is shared at redhat.com. The identification of this vulnerability is CVE-2007-0003 since 12/19/2006. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1211 for this issue.

It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 27380 (openSUSE 10 Security Update : pam (pam-2601)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l.

Upgrading to version 0.99.7.1 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (31739), Tenable (27380), SecurityFocus (BID 22204†), OSVDB (32017†) and Secunia (SA23858†). redhat.com is providing further details. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.5
VulDB Temp Score: 5.7
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: Security check
CWE: CWE-358
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 27380
Nessus Name: openSUSE 10 Security Update : pam (pam-2601)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 0.99.7.1

Timelineinfo

12/19/2006 🔍
01/23/2007 +35 days 🔍
01/23/2007 +0 days 🔍
01/23/2007 +0 days 🔍
01/24/2007 +1 days 🔍
01/24/2007 +0 days 🔍
01/24/2007 +0 days 🔍
01/24/2007 +0 days 🔍
01/26/2007 +1 days 🔍
02/08/2007 +13 days 🔍
10/17/2007 +251 days 🔍
10/23/2007 +6 days 🔍
07/29/2019 +4297 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: redhat.com
Researcher: Bernardo Innocenti
Status: Confirmed

CVE: CVE-2007-0003 (🔍)
GCVE (CVE): GCVE-0-2007-0003
GCVE (VulDB): GCVE-100-2873
X-Force: 31739 - Linux-PAM pam_unix.so security bypass, Medium Risk
SecurityFocus: 22204 - Linux-PAM Pam_Unix.SO Authentication Bypass Vulnerability
Secunia: 23858
OSVDB: 32017 - Linux-PAM Two Character Hash Login Bypass
Vulnerability Center: 16647 - Linux-PAM 0.99.7.0 Allows Security Restrictions Bypass Related to Password Hashes with 2 Characters, High
Vupen: ADV-2007-0323

Misc.: 🔍

Entryinfo

Created: 01/26/2007 13:06
Updated: 07/29/2019 09:10
Changes: 01/26/2007 13:06 (90), 07/29/2019 09:10 (2)
Complete: 🔍
Cache ID: 216:2EA:103

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

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