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Gentoo: GLSA-201006-12 Normal: Fetchmail Remote Code Execution

gentoo
Calendar Grey June 2, 2010
Dist Gentoo Esm H88
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Adviso
Multiple vulnerabilities have been reported in Fetchmail, allowing remote attackers to execute arbitrary code or to conduct Man-in-the-Middle attacks

Summary

Multiple vulnerabilities have been reported in Fetchmail: * The sdump() function might trigger a heap-based buffer overflow during the escaping of non-printable characters with the high bit set from an X.509 certificate (CVE-2010-0562).
* The vendor reported that Fetchmail does not properly handle Common Name (CN) fields in X.509 certificates that contain an ASCII NUL character. Specifically, the processing of such fields is stopped at the first occurrence of a NUL character. This type of vulnerability was recently discovered by Dan Kaminsky and Moxie Marlinspike (CVE-2009-2666).

Topics%20covered

Topics Covered

security advisory gentoo fetchmail remote code execution man-in-the-middle normal

Resolution

All Fetchmail users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/fetchmail-6.3.14"

References

[ 1 ] CVE-2010-0562 https://www.cve.org/CVERecord?id=CVE-2010-0562 [ 2 ] CVE-2009-2666 https://www.cve.org/CVERecord?id=CVE-2009-2666

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201006-12
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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: Fetchmail: Multiple vulnerabilities
Date: June 01, 2010
Bugs: #280537, #307761
ID: 201006-12

Topics%20covered

Topics Covered

security advisory gentoo fetchmail remote code execution man-in-the-middle normal

Synopsis

Multiple vulnerabilities have been reported in Fetchmail, allowing remote attackers to execute arbitrary code or to conduct Man-in-the-Middle attacks.

Background

Fetchmail is a remote mail retrieval and forwarding utility.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-mail/fetchmail < 6.3.14 >= 6.3.14

Impact

===== A remote attacker could entice a user to connect with Fetchmail to a specially crafted SSL-enabled server in verbose mode, possibly resulting in the execution of arbitrary code with the privileges of the user running the application. NOTE: The issue is only existent on platforms on which char is signed. Furthermore, a remote attacker might employ a specially crafted X.509 certificate, containing a NUL character in the Common Name field to conduct man-in-the-middle attacks on SSL connections made using Fetchmail.

Workaround

There is no known workaround at this time.

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