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Gentoo: GLSA-202310-13 High: GNU Mailutils Escape Sequence RCE Issue

gentoo
Calendar Grey October 19, 2023
Dist Gentoo Esm H88
Uncover the ramifications of a critical RCE flaw in GNU Mailutils affecting Gentoo distributions, alongside suggested mitigations.
A vulnerability has been discovered in Mailutils where escape sequences are processed in a context where this may lead to RCE.

Summary

A vulnerability has been discovered in GNU Mailutils. Please review the CVE identifier referenced below for details.

Topics%20covered

Topics Covered

security advisory high severity gentoo vulnerability escape sequences RCE Mailutils

Resolution

All Mailutils users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/mailutils-3.12-r3"

References

[ 1 ] CVE-2021-32749 https://nvd.nist.gov/vuln/detail/CVE-2021-32749

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/202310-13
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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: High
Title: GNU Mailutils: unexpected processsing of escape sequences
Date: October 19, 2023
Bugs: #802867
ID: 202310-13

Topics%20covered

Topics Covered

security advisory high severity gentoo vulnerability escape sequences RCE Mailutils

Synopsis

A vulnerability has been discovered in Mailutils where escape sequences are processed in a context where this may lead to RCE.

Background

GNU Mailutils is a collection of mail-related utilities, including an IMAP4 server (imap4d) and a Mail User Agent (mail).

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Affected Packages

Package Vulnerable Unaffected ------------------ ------------ ------------ net-mail/mailutils < 3.12-r3 >= 3.12-r3

Impact

mail(1) from mailutils would process escape sequences (like ~! shellcommand) in message bodies piped/redirected in. This creates an RCE if some part of the message body is under an attacker's control.

Workaround

There is no known workaround at this time.

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