Executive Summary

Summary
Title rssh: Access restriction bypass
Informations
Name GLSA-201311-19 First vendor Publication 2013-11-28
Vendor Gentoo Last vendor Modification 2013-11-28
Severity (Vendor) Normal Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 4.4 Attack Range Local
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

Multiple vulnerabilities have been found in rssh, allowing local attackers to bypass access restrictions.

Background

rssh is a restricted shell, allowing only a few commands like scp or sftp. It is often used as a complement to OpenSSH to provide limited access to users.

Description

Multiple command line parsing and validation vulnerabilities have been discovered in rssh. Please review the CVE identifiers referenced below for details.

Impact

Multiple parsing and validation vulnerabilities can cause the restrictions set up by rssh to be bypassed.

Workaround

There is no known workaround at this time.

Resolution

All rssh users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/rssh-2.3.4"

References

[ 1 ] CVE-2012-2252 : http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-2252
[ 2 ] CVE-2012-3478 : http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-3478

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-201311-19.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-201311-19.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-264 Permissions, Privileges, and Access Controls

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:18642
 
Oval ID: oval:org.mitre.oval:def:18642
Title: DSA-2530-1 rssh - shell command injection
Description: Henrik Erkkonen discovered that rssh, a restricted shell for SSH, does not properly restrict shell access.
Family: unix Class: patch
Reference(s): DSA-2530-1
CVE-2012-3478
 Version: 7
Platform(s): Debian GNU/Linux 6.0
Debian GNU/kFreeBSD 6.0
 Product(s): rssh
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:19885
 
Oval ID: oval:org.mitre.oval:def:19885
Title: DSA-2578-1 rssh - several
Description: James Clawson discovered that rssh, a restricted shell for OpenSSH to be used with scp, sftp, rdist and cvs, was not correctly filtering command line options. This could be used to force the execution of a remote script and thus allow arbitrary command execution. Two CVE were assigned.
Family: unix Class: patch
Reference(s): DSA-2578-1
CVE-2012-2251
CVE-2012-2252
 Version: 5
Platform(s): Debian GNU/Linux 6.0
Debian GNU/kFreeBSD 6.0
 Product(s): rssh
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 14

OpenVAS Exploits

Date Description
2012-12-26 Name : Fedora Update for rssh FEDORA-2012-20109
File : nvt/gb_fedora_2012_20109_rssh_fc17.nasl
2012-12-04 Name : Debian Security Advisory DSA 2578-1 (rssh)
File : nvt/deb_2578_1.nasl
2012-08-30 Name : Debian Security Advisory DSA 2530-1 (rssh)
File : nvt/deb_2530_1.nasl
2012-08-30 Name : FreeBSD Ports: rssh
File : nvt/freebsd_rssh4.nasl

Nessus® Vulnerability Scanner

Date Description
2013-11-29 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201311-19.nasl - Type : ACT_GATHER_INFO
2013-01-14 Name : The remote Fedora host is missing a security update.
File : fedora_2012-20111.nasl - Type : ACT_GATHER_INFO
2012-12-20 Name : The remote Fedora host is missing a security update.
File : fedora_2012-20109.nasl - Type : ACT_GATHER_INFO
2012-11-28 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2578.nasl - Type : ACT_GATHER_INFO
2012-08-22 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_65b25acce63b11e1b81c001b77d09812.nasl - Type : ACT_GATHER_INFO
2012-08-16 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2530.nasl - Type : ACT_GATHER_INFO

Alert History

If you want to see full details history, please login or register.
0
1
Date Informations
2014-02-17 11:37:56
  • Multiple Updates
2013-11-28 13:18:23
  • First insertion