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[ GLSA 200409-32 ] getmail: Filesystem overwrite vulnerability
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GLSA
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Joined: 13 Jun 2003
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Location: Barcelona, Spain

PostPosted: Fri Sep 24, 2004 7:29 am    Post subject: [ GLSA 200409-32 ] getmail: Filesystem overwrite vulnerabili Reply with quote

Gentoo Linux Security Advisory

Title: getmail: Filesystem overwrite vulnerability (GLSA 200409-32)
Severity: high
Exploitable: local
Date: September 23, 2004
Updated: May 22, 2006
Bug(s): #64643
ID: 200409-32

Synopsis

getmail contains a vulnerability that could potentially allow any local user to create or overwrite files in any directory on the system. This flaw can be escalated further and possibly lead to a complete system compromise.

Background

getmail is a reliable fetchmail replacement that supports Maildir, Mboxrd and external MDA delivery.

Affected Packages

Package: net-mail/getmail
Vulnerable: < 4.2.0
Unaffected: >= 4.2.0
Architectures: All supported architectures


Description

David Watson discovered a vulnerability in getmail when it is configured to run as root and deliver mail to the maildirs/mbox files of untrusted local users. A malicious local user can then exploit a race condition, or a similar symlink attack, and potentially cause getmail to create or overwrite files in any directory on the system.

Impact

An untrusted local user could potentially create or overwrite files in any directory on the system. This vulnerability may also be exploited to have arbitrary commands executed as root.

Workaround

Do not run getmail as a privileged user; or, in version 4, use an external MDA with explicitly configured user and group privileges.

Resolution

All getmail users should upgrade to the latest version:
Code:
# emerge sync
# emerge -pv ">=net-mail/getmail-4.2.0"
# emerge ">=net-mail/getmail-4.2.0"


References

getmail ChangeLog
getmail Mailing List
CVE-2004-0880
CVE-2004-0881


Last edited by GLSA on Tue May 23, 2006 4:18 am; edited 2 times in total
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