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Heimdal: ftpd root escalation

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200409-19 / heimdal
Release Date September 16, 2004
Latest Revision September 16, 2004: 01
Impact high
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-crypt/heimdal < 0.6.3 >= 0.6.3 All supported architectures

Related bugreports: #61412

Synopsis

Several bugs exist in the Heimdal ftp daemon which could allow a remote attacker to gain root privileges.

2.  Impact Information

Background

Heimdal is an implementation of Kerberos 5.

Description

Przemyslaw Frasunek discovered several flaws in lukemftpd, which also apply to Heimdal ftpd's out-of-band signal handling code.

Additionally, a potential vulnerability that could lead to Denial of Service by the Key Distribution Center (KDC) has been fixed in this version.

Impact

A remote attacker could be able to run arbitrary code with escalated privileges, which can result in a total compromise of the server.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Heimdal users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge sync
# emerge -pv ">=app-crypt/heimdal-0.6.3"
# emerge ">=app-crypt/heimdal-0.6.3"

4.  References



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Page updated September 16, 2004

Summary: This is a Gentoo Linux Security Advisory

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