Red Hat Linux up to 7.2 Shell symlink

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

A vulnerability classified as critical has been found in Red Hat Linux up to 7.2 (Operating System). Affected is an unknown functionality of the component Shell. The manipulation with an unknown input leads to a symlink vulnerability. CWE is classifying the issue as CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Multiple shell programs on various Unix systems, including (1) tcsh, (2) csh, (3) sh, and (4) bash, follow symlinks when processing << redirects (aka here-documents or in-here documents), which allows local users to overwrite files of other users via a symlink attack.

The weakness was published 10/28/2000 by Paul Szabo as confirmed advisory (CERT.org). The advisory is available at kb.cert.org. This vulnerability is traded as CVE-2000-1134. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed by t--zen in ANSI C and been published 2 months after the advisory. The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 61861 (Mandrake Linux Security Advisory : bash1 (MDKSA-2000:075)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (5593), Tenable (61861) and Exploit-DB (217). Similar entry is available at 16291.

Affected

  • Conectiva Linux 4.0/4.1/4.2/5.0/5.1
  • Mandrakesoft Mandrake Linux 6.0/6.1/7.0/7.1/7.2
  • SuSE Linux 7.0
  • Red Hat Linux 5.2/6.0/6.1/6.2

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Symlink
CWE: CWE-61 / CWE-59
ATT&CK: Unknown

Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 61861
Nessus Name: Mandrake Linux Security Advisory : bash1 (MDKSA-2000:075)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 835000
OpenVAS Name: HP StorageWorks Default Accounts and Directory Traversal Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

01/02/2000 🔍
10/28/2000 +300 days 🔍
11/20/2000 +23 days 🔍
12/04/2000 +14 days 🔍
12/04/2000 +0 days 🔍
01/09/2001 +36 days 🔍
04/09/2004 +1185 days 🔍
08/30/2009 +1969 days 🔍
09/06/2012 +1103 days 🔍
07/02/2014 +664 days 🔍
06/25/2021 +2550 days 🔍

Sourcesinfo

Vendor: redhat.com

Advisory: kb.cert.org
Researcher: Paul Szabo
Status: Confirmed

CVE: CVE-2000-1134 (🔍)
OVAL: 🔍

X-Force: 5593
Vulnerability Center: 23320 - Multiple Shell Programs Local Files Overwrite via a Symlink Attack, Medium
SecurityFocus: 2006 - Unix Shell Redirection Race Condition Vulnerability
OSVDB: 14158 - Multiple Unix Shell << Redirect Symlink Arbitrary File Overwrite

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

Entryinfo

Created: 07/02/2014 15:15
Updated: 06/25/2021 11:19
Changes: 07/02/2014 15:15 (69), 02/13/2017 10:30 (17), 06/25/2021 11:19 (3)
Complete: 🔍

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