Executive Summary

Summary
Title MirBSD Korn Shell: Arbitrary code execution
Informations
Name GLSA-201511-01 First vendor Publication 2015-11-02
Vendor Gentoo Last vendor Modification 2015-11-02
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 :
Cvss Base Score Not Defined Attack Range Not Defined
Cvss Impact Score Not Defined Attack Complexity Not Defined
Cvss Expoit Score Not Defined Authentication Not Defined
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

An attacker who already had access to the environment could so append values to parameters passed through programs.

Background

MirBSD Korn Shell is an actively developed free implementation of the Korn Shell programming language and a successor to the Public Domain Korn Shell.

Description

Improper sanitation of environment import allows for appending of values to passed parameters.

Impact

An attacker who already had access to the environment could so append values to parameters passed through programs (including sudo(8) or setuid) to shell scripts, including indirectly, after those programs intended to sanitise the environment, e.g. invalidating the last $PATH component.

Workaround

There is no known workaround at this time.

Resolution

All mksh users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/mksh-50c"

References

[ 1 ] mksh R50c released, security fix

https://www.mirbsd.org/permalinks/wlog-10_e20141003-tg.htm#e20141003-tg_wlog-10

Availability

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

https://security.gentoo.org/glsa/201511-01

Original Source

Url : http://security.gentoo.org/glsa/glsa-201511-01.xml

Alert History

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0
1
Date Informations
2015-11-04 13:24:10
  • Multiple Updates
2015-11-02 21:21:45
  • First insertion