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Gentoo: GLSA-202003-48 Critical Warning Exim Memory Overflow Threat

gentoo
Calendar Grey March 20, 2020
Dist Gentoo Esm H88
Exim's critical buffer overflow vulnerability enables remote adversaries to run arbitrary commands. It's advised to update promptly to reduce dangers.
A vulnerability in Exim could allow a remote attacker to execute arbitrary code.

Summary

It was discovered that Exim incorrectly handled certain string operations.

Topics%20covered

Topics Covered

security advisory high severity security issue gentoo buffer overflow remote code execution exim

Resolution

All Exim users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/exim-4.92.3"

References

[ 1 ] CVE-2019-16928 https://nvd.nist.gov/vuln/detail/CVE-2019-16928

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202003-47
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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
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Critical

Severity: High
Title: Exim: Heap-based buffer overflow
Date: March 20, 2020
Bugs: #701282
ID: 202003-47

Topics%20covered

Topics Covered

security advisory high severity security issue gentoo buffer overflow remote code execution exim

Synopsis

A vulnerability in Exim could allow a remote attacker to execute arbitrary code.

Background

Exim is a message transfer agent (MTA) designed to be a a highly configurable, drop-in replacement for sendmail.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 mail-mta/exim < 4.92.3 >= 4.92.3

Impact

===== A remote attacker, able to connect to a vulnerable Exim instance, could possibly execute arbitrary code with the privileges of the process or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

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