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Gentoo: 2017-09-19 Warning: Exim Local Security Vulnerability Detected

gentoo
Calendar Grey September 24, 2017
Dist Gentoo Esm H88
A recent privilege escalation flaw in Exim has been identified, impacting Gentoo Linux systems. To address this issue, upgrade to the most recent version.
A vulnerability in Exim may allow local users to gain root privileges.

Summary

Exim supports the use of multiple "-p" command line arguments causing a memory leak. This could lead to a stack-clash in user-space and as result the attacker can, "clash" or "smash" the stack or another memory region, or "jump" over the stack guard-page.

Topics%20covered

Topics Covered

security advisory gentoo exim memory leak local escalation user privileges normal

Resolution

All Exim users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/exim-4.89-r1"

References

[ 1 ] CVE-2017-1000369 https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-1000369

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201709-19
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: Exim: Local privilege escalation
Date: September 24, 2017
Bugs: #622212
ID: 201709-19

Topics%20covered

Topics Covered

security advisory gentoo exim memory leak local escalation user privileges normal

Synopsis

A vulnerability in Exim may allow local users to gain root privileges.

Background

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 mail-mta/exim < 4.89-r1 >= 4.89-r1

Impact

===== A local attacker could obtain root privileges.

Workaround

There is no known workaround at this time.