Python Software Foundation up to 2.4.2 realpath stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

A vulnerability has been found in Python Software Foundation Python up to 2.4.2 (Programming Language Software) and classified as problematic. Affected by this vulnerability is the function realpath. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in Python 2.4.2 and earlier, running on Linux 2.6.12.5 under gcc 4.0.3 with libc 2.3.5, allows local users to cause a "stack overflow," and possibly gain privileges, by running a script from a current working directory that has a long name, related to the realpath function. NOTE: this might not be a vulnerability. However, the fact that it appears in a programming language interpreter could mean that some applications are affected, although attack scenarios might be limited because the attacker might already need to cross privilege boundaries to cause an exploitable program to be placed in a directory with a long name; or, depending on the method that Python uses to determine the current working directory, setuid applications might be affected.

The weakness was published 03/19/2006 by Gotfault Security (Website). The advisory is shared at redhat.com. This vulnerability is known as CVE-2006-1542. The exploitation appears to be difficult. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

A public exploit has been developed by Gotfault Security and been published even before and not after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 43836 (RHEL 4 : Solaris client in Satellite Server (RHSA-2008:0264)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks.

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 X-Force (25664), Tenable (43836) and Exploit-DB (1591). Similar entry is available at 1643.

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.9
VulDB Temp Score: 5.6
VulDB Vector: 🔍
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CVSSv2info

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Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Gotfault Security
Download: 🔍

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EPSS Percentile: 🔍

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Nessus ID: 43836
Nessus Name: RHEL 4 : Solaris client in Satellite Server (RHSA-2008:0264)
Nessus File: 🔍
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Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/22/2006 🔍
03/18/2006 +24 days 🔍
03/18/2006 +0 days 🔍
03/19/2006 +1 days 🔍
03/22/2006 +3 days 🔍
03/30/2006 +7 days 🔍
03/30/2006 +0 days 🔍
11/17/2010 +1693 days 🔍
03/12/2015 +1576 days 🔍
07/08/2021 +2310 days 🔍

Sourcesinfo

Advisory: redhat.com
Researcher: Gotfault Security
Status: Confirmed

CVE: CVE-2006-1542 (🔍)
X-Force: 25664
Vulnerability Center: 28261 - Python 2.4.2 and Earlier on Linux 2.6.12.5 Local Stack-Based Buffer Overflow Vulnerability, Medium
Secunia: 31492
OSVDB: 24042 - Python Interpreter realpath() Function Overflow

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

Entryinfo

Created: 03/12/2015 12:19
Updated: 07/08/2021 14:29
Changes: 03/12/2015 12:19 (56), 03/09/2017 11:49 (15), 07/08/2021 14:27 (3), 07/08/2021 14:29 (1)
Complete: 🔍

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