ssl-cert eclass: Certificate disclosure

Security Team  Contact Address

Updated March 20, 2008

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200803-30 / ssl-cert.eclass
Release Date March 20, 2008
Latest Revision March 20, 2008: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-admin/conserver < 8.1.16 >= 8.1.16 All supported architectures
mail-mta/postfix < 2.4.6-r2 >= 2.4.6-r2, revision >= 2.3.8-r1, revision >= 2.2.11-r1 All supported architectures
net-ftp/netkit-ftpd < 0.17-r7 >= 0.17-r7 All supported architectures
net-im/ejabberd < 1.1.3 >= 1.1.3 All supported architectures
net-irc/unrealircd < 3.2.7-r2 >= 3.2.7-r2 All supported architectures
net-mail/cyrus-imapd < 2.3.9-r1 >= 2.3.9-r1 All supported architectures
net-mail/dovecot < 1.0.10 >= 1.0.10 All supported architectures
net-misc/stunnel < 4.21-r1 >= 4.21-r1, < 4.0 All supported architectures
net-nntp/inn < 2.4.3-r1 >= 2.4.3-r1 All supported architectures

Related bugreports: #174759

Synopsis

An error in the usage of the ssl-cert eclass within multiple ebuilds might allow for disclosure of generated SSL private keys.

2.  Impact Information

Background

The ssl-cert eclass is a code module used by Gentoo ebuilds to generate SSL certificates.

Description

Robin Johnson reported that the docert() function provided by ssl-cert.eclass can be called by source building stages of an ebuild, such as src_compile() or src_install(), which will result in the generated SSL keys being included inside binary packages (binpkgs).

Impact

A local attacker could recover the SSL keys from publicly readable binary packages when "emerge" is called with the "--buildpkg (-b)" or "--buildpkgonly (-B)" option. Remote attackers can recover these keys if the packages are served to a network. Binary packages built using "quickpkg" are not affected.

3.  Resolution Information

Workaround

Do not use pre-generated SSL keys, but use keys that were generated using a different Certificate Authority.

Resolution

Upgrading to newer versions of the above packages will neither remove possibly compromised SSL certificates, nor old binary packages. Please remove the certificates installed by Portage, and then emerge an upgrade to the package.

All Conserver users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-admin/conserver-8.1.16"

All Postfix 2.4 users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.4.6-r2"

All Postfix 2.3 users should upgrade to the latest version:

Code Listing 3.3: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.3.8-r1"

All Postfix 2.2 users should upgrade to the latest version:

Code Listing 3.4: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.2.11-r1"

All Netkit FTP Server users should upgrade to the latest version:

Code Listing 3.5: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-ftp/netkit-ftpd-0.17-r7"

All ejabberd users should upgrade to the latest version:

Code Listing 3.6: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-im/ejabberd-1.1.3"

All UnrealIRCd users should upgrade to the latest version:

Code Listing 3.7: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-irc/unrealircd-3.2.7-r2"

All Cyrus IMAP Server users should upgrade to the latest version:

Code Listing 3.8: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/cyrus-imapd-2.3.9-r1"

All Dovecot users should upgrade to the latest version:

Code Listing 3.9: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/dovecot-1.0.10"

All stunnel 4 users should upgrade to the latest version:

Code Listing 3.10: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/stunnel-4.21"

All InterNetNews users should upgrade to the latest version:

Code Listing 3.11: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-nntp/inn-2.4.3-r1"

4.  References