Debian Security Advisory
DSA-1629-2 postfix -- programming error
- Date Reported:
- 19 Aug 2008
- Affected Packages:
- postfix
- Vulnerable:
- Yes
- Security database references:
- In Mitre's CVE dictionary: CVE-2008-2936.
- More information:
-
Sebastian Krahmer discovered that Postfix, a mail transfer agent, incorrectly checks the ownership of a mailbox. In some configurations, this allows for appending data to arbitrary files as root.
Note that only specific configurations are vulnerable; the default Debian installation is not affected. Only a configuration meeting the following requirements is vulnerable:
- The mail delivery style is mailbox, with the Postfix built-in local(8) or virtual(8) delivery agents.
- The mail spool directory (/var/spool/mail) is user-writeable.
- The user can create hardlinks pointing to root-owned symlinks located in other directories.
For a detailed treating of the issue, please refer to the upstream author's announcement.
For the stable distribution (etch), this problem has been fixed in version 2.3.8-2+etch1.
For the testing distribution (lenny), this problem has been fixed in version 2.5.2-2lenny1.
For the unstable distribution (sid), this problem has been fixed in version 2.5.4-1.
We recommend that you upgrade your postfix package.
- Fixed in:
-
Debian GNU/Linux 4.0 (etch)
- Source:
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8.orig.tar.gz
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1.diff.gz
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1.dsc
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1.diff.gz
- Architecture-independent component:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-dev_2.3.8-2+etch1_all.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-doc_2.3.8-2+etch1_all.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-doc_2.3.8-2+etch1_all.deb
- Alpha:
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_alpha.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_alpha.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_alpha.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_alpha.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_alpha.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_alpha.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_alpha.deb
- AMD64:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_amd64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_amd64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_amd64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_amd64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_amd64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_amd64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_amd64.deb
- ARM:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_arm.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_arm.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_arm.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_arm.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_arm.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_arm.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_arm.deb
- HP Precision:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_hppa.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_hppa.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_hppa.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_hppa.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_hppa.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_hppa.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_hppa.deb
- Intel IA-32:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_i386.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_i386.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_i386.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_i386.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_i386.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_i386.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_i386.deb
- Intel IA-64:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_ia64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_ia64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_ia64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_ia64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_ia64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_ia64.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_ia64.deb
- Big-endian MIPS:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_mips.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_mips.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_mips.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_mips.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_mips.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_mips.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_mips.deb
- PowerPC:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_powerpc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_powerpc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_powerpc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_powerpc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_powerpc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_powerpc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_powerpc.deb
- IBM S/390:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_s390.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_s390.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_s390.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_s390.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_s390.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_s390.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_s390.deb
- Sun Sparc:
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2+etch1_sparc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_sparc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2+etch1_sparc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2+etch1_sparc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2+etch1_sparc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2+etch1_sparc.deb
- http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2+etch1_sparc.deb
MD5 checksums of the listed files are available in the original advisory.