FreeBSD 4.0/4.1/4.2/4.3 Signal exec privileges management

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

A vulnerability, which was classified as critical, was found in FreeBSD 4.0/4.1/4.2/4.3 (Operating System). This affects the function exec of the component Signal Handler. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

FreeBSD 4.3 does not properly clear shared signal handlers when executing a process, which allows local users to gain privileges by calling rfork with a shared signal handler, having the child process execute a setuid program, and sending a signal to the child.

The weakness was disclosed 07/10/2001 by Georgi Guninski as confirmed advisory (CERT.org). The advisory is shared at kb.cert.org. This vulnerability is uniquely identified as CVE-2001-1180. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details and a exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (6829).

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.4
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
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Timelineinfo

07/10/2001 🔍
07/10/2001 +0 days 🔍
07/10/2001 +0 days 🔍
07/10/2001 +0 days 🔍
07/10/2001 +0 days 🔍
02/21/2003 +591 days 🔍
07/05/2009 +2325 days 🔍
07/07/2014 +1828 days 🔍
02/11/2017 +950 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: kb.cert.org
Researcher: Georgi Guninski
Status: Confirmed

CVE: CVE-2001-1180 (🔍)
X-Force: 6829
Vulnerability Center: 22763 - FreeBSD <= 4.3 Rfork Shared Signal Handler Local Arbitrary Code Execution Vulnerability, High
SecurityFocus: 3007 - FreeBSD exec() Inherited Signal Handler Vulnerability
OSVDB: 1897 - FreeBSD exec() Inherited Signal Handler

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

Entryinfo

Created: 07/07/2014 12:57
Updated: 02/11/2017 10:21
Changes: 07/07/2014 12:57 (55), 02/11/2017 10:21 (9)
Complete: 🔍

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