FreeBSD 7.1/7.2/8.0 _rtld LD_PRELOAD access control

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in FreeBSD 7.1/7.2/8.0. Affected by this issue is the function _rtld. Performing a manipulation of the argument LD_PRELOAD results in access control. This vulnerability is reported as CVE-2009-4146. Moreover, an exploit is present.

Detailsinfo

A vulnerability, which was classified as critical, was found in FreeBSD 7.1/7.2/8.0 (Operating System). This affects the function _rtld. The manipulation of the argument LD_PRELOAD with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147.

The weakness was disclosed 12/02/2009 (Website). The advisory is shared at securitytracker.com. This vulnerability is uniquely identified as CVE-2009-4146 since 12/01/2009. 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 public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue.

A public exploit has been developed in Shell File. The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (10255), SecurityFocus (BID 37154†), Secunia (SA37517†), SecurityTracker (ID 1023250†) and Vulnerability Center (SBV-39733†). The entry VDB-51002 is pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.4
VulDB Temp Score: 7.9
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: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 68509
OpenVAS Name: FreeBSD Ports: FreeBSD
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/30/2009 🔍
12/01/2009 +1 days 🔍
12/01/2009 +0 days 🔍
12/01/2009 +0 days 🔍
12/02/2009 +1 days 🔍
12/02/2009 +0 days 🔍
05/28/2013 +1273 days 🔍
03/18/2015 +659 days 🔍
09/03/2024 +3457 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: securitytracker.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-4146 (🔍)
GCVE (CVE): GCVE-0-2009-4146
GCVE (VulDB): GCVE-100-50997
SecurityFocus: 37154
Secunia: 37517 - FreeBSD Dynamic Linker Privilege Escalation Vulnerability, Less Critical
SecurityTracker: 1023250 - FreeBSD rtld Lets Local Users Gain Root Privileges
Vulnerability Center: 39733 - FreeBSD 7.1, 7.2, 8.0 Run-Time Link-Editor Allows Local Privilege Escalation, Medium

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

Entryinfo

Created: 03/18/2015 15:15
Updated: 09/03/2024 20:27
Changes: 03/18/2015 15:15 (62), 05/01/2017 00:27 (11), 06/10/2024 18:14 (16), 09/03/2024 20:27 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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