The Debian Security Team published a new security update for Debian GNU/Linux. Here the announcement:
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Debian Security Advisory DSA-1629-1 security@debian.org
http://www.debian.org/security/ Thijs Kinkhorst
August 18, 2008 http://www.debian.org/security/faq
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Package : postfix
Vulnerability : programming error
Problem type : local
Debian-specific: no
CVE Id(s) : CVE-2008-2936

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.

The default Debian installation of Postfix 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 is user-writeable.
* The user can create hardlinks pointing to root-owned symlinks
located in other directories.

For a detailed treating of this issue, please refer to the upstream
author's announcement:
http://article.gmane.org/gmane.mail.postfix.announce/110

For the stable distribution (etch), this problem has been fixed in
version 2.3.8-2etch1.

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.

Upgrade instructions
- --------------------

wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
will update the internal database
apt-get upgrade
will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 4.0 alias etch
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Source archives:

http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8.orig.tar.gz
Size/MD5 checksum: 2787761 a6c560657788fc7a5444fa9ea32f5513
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1.diff.gz
Size/MD5 checksum: 177462 0827e61a7033e8625d92123c84b32782
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1.dsc
Size/MD5 checksum: 907 8e9f0c462c57eb2be521714404474aca

Architecture independent packages:

http://security.debian.org/pool/updates/main/p/postfix/postfix-dev_2.3.8-2etch1_all.deb
Size/MD5 checksum: 130818 5038e376db1c661eb0284f96dff4761a
http://security.debian.org/pool/updates/main/p/postfix/postfix-doc_2.3.8-2etch1_all.deb
Size/MD5 checksum: 785408 5db9bdc0300637afd3d508afe2c261dc

alpha architecture (DEC Alpha)

http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_alpha.deb
Size/MD5 checksum: 1188364 c8c7f45763ccfd74b84335ea073c551c
http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_alpha.deb
Size/MD5 checksum: 36556 fcb1c6262baed1402032c2105b83d059
http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_alpha.deb
Size/MD5 checksum: 38746 a0d1334395beda433d586b63b0d60b80
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_alpha.deb
Size/MD5 checksum: 43408 d9e830efc4532ccddc46f394232959a6
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_alpha.deb
Size/MD5 checksum: 38596 855c8573280d5b191a12175b2e7afe8c
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_alpha.deb
Size/MD5 checksum: 38928 579217f55db12977c61b8d437f3ab436

amd64 architecture (AMD x86_64 (AMD64))

http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_amd64.deb
Size/MD5 checksum: 38318 24205dd0481bb1d78684167d8d20f44f
http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_amd64.deb
Size/MD5 checksum: 38338 50a46f34f638ea42525b98ca985b4f11
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_amd64.deb
Size/MD5 checksum: 43268 a24dd35f2ec288c2c4f674099e44385f
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_amd64.deb
Size/MD5 checksum: 1148848 f27f053dffd95b730f1186ed37ed8673
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_amd64.deb
Size/MD5 checksum: 38460 907b2a8d84a54cdf31ade8c201d3780a
http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_amd64.deb
Size/MD5 checksum: 36378 1ab120583bcc5873a5350d9786282eab

arm architecture (ARM)

http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_arm.deb
Size/MD5 checksum: 42742 2d6799c7726a3943a39939baebacdc98
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_arm.deb
Size/MD5 checksum: 38324 6acd31d6ce0200fdd49043c99459c4c8
http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_arm.deb
Size/MD5 checksum: 38394 52628e6399391671a8512ed25739813c
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_arm.deb
Size/MD5 checksum: 38592 1db4a21bb2c6f135e342b65317ecb897
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_arm.deb
Size/MD5 checksum: 1080626 3e05804bf0bf7101ae3e4eec33d1524f
http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_arm.deb
Size/MD5 checksum: 36378 71361b9cd3c008a9e96e8c23866b1a80

hppa architecture (HP PA RISC)

http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_hppa.deb
Size/MD5 checksum: 37504 76b3b4785a5e91fc1010ce32ccee31ed
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_hppa.deb
Size/MD5 checksum: 45296 73bc72e54d6ef6909fd3df4266061d7b
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_hppa.deb
Size/MD5 checksum: 40138 807908ccb69444d9aa1917861dc51af9
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_hppa.deb
Size/MD5 checksum: 1174040 44260c5be83cd1d051de22c155aee72a
http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_hppa.deb
Size/MD5 checksum: 39814 547026b4994dfbf216be7f9ee0487054
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_hppa.deb
Size/MD5 checksum: 39624 69209a3695bb1568f8c11e6ab4bb792d

i386 architecture (Intel ia32)

http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_i386.deb
Size/MD5 checksum: 36514 2c10b797c15b02828b344693d4f9c597
http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_i386.deb
Size/MD5 checksum: 38680 d1beb196bcc090457a791760b5e7bdfd
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_i386.deb
Size/MD5 checksum: 38354 d074798f79b42bd245e13b8ce0f3adef
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_i386.deb
Size/MD5 checksum: 43160 40cc3fc2fc6374a07893321c2758a447
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_i386.deb
Size/MD5 checksum: 38770 d97f22246f4cb6cb48e4c993ad37daac
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_i386.deb
Size/MD5 checksum: 1092656 30352104ad6fad91f13b996483e52e5b

ia64 architecture (Intel ia64)

http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_ia64.deb
Size/MD5 checksum: 37958 d3628d8f8d4fa6cc760ef77e21acb468
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_ia64.deb
Size/MD5 checksum: 40762 6c5dcb7f2d6196ddf23a8e6d7b9e5f10
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_ia64.deb
Size/MD5 checksum: 47878 bb8188e31d1a632164d1bb5dda88a810
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_ia64.deb
Size/MD5 checksum: 1439608 cfc2f5db48f0f6bcc8ddb3e85a4032d6
http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_ia64.deb
Size/MD5 checksum: 40766 59cd143a5727868aaae30f309286a433
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_ia64.deb
Size/MD5 checksum: 41066 385bf68a76cd27e12e012bf535a841e0

mips architecture (MIPS (Big Endian))

http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_mips.deb
Size/MD5 checksum: 38194 014b70898f5aae21a95877c4e32f9941
http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_mips.deb
Size/MD5 checksum: 36186 7c957d531808b35bd6994aeea448e213
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_mips.deb
Size/MD5 checksum: 38188 29a16989a6414ed3722f1422f46d9cd2
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_mips.deb
Size/MD5 checksum: 38446 0dc8cfc6f527161b8b4ce16dd8b297c6
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_mips.deb
Size/MD5 checksum: 1129132 4e6a95c1f4040b7b24ac18ab80455d4d
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_mips.deb
Size/MD5 checksum: 42376 af1d25a56c756443db89f6aa6a7bbb38

powerpc architecture (PowerPC)

http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_powerpc.deb
Size/MD5 checksum: 37738 ee3c0924d5deb0d61741c9497156c0bf
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_powerpc.deb
Size/MD5 checksum: 44218 6ade57e38f9948016b71e6373f6f1863
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_powerpc.deb
Size/MD5 checksum: 39670 6a6597cfb2a225d05963a149386d8fcc
http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_powerpc.deb
Size/MD5 checksum: 39774 3979adcff1c659588beb2e65c5ddb4d3
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_powerpc.deb
Size/MD5 checksum: 1167716 45d3590893a6b4c3efc99780508f92e1
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_powerpc.deb
Size/MD5 checksum: 39966 7acc51d59c4c640b8c4963c09c573356

s390 architecture (IBM S/390)

http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_s390.deb
Size/MD5 checksum: 38752 56864ace555741a8e580ac9cdad129c3
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_s390.deb
Size/MD5 checksum: 1154368 f62e41e9b4d18eaaf76d0096370ceb1f
http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_s390.deb
Size/MD5 checksum: 36562 9deaaf037d9694a5a09f01743c687a52
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_s390.deb
Size/MD5 checksum: 38360 6191ba334c80aa5e4dd12df40781c96d
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_s390.deb
Size/MD5 checksum: 43310 9a73eaee5cfd0b3656976a36c256e676
http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_s390.deb
Size/MD5 checksum: 38918 570c0d157fd6b6b4102122a965d3e6f6

sparc architecture (Sun SPARC/UltraSPARC)

http://security.debian.org/pool/updates/main/p/postfix/postfix-pgsql_2.3.8-2etch1_sparc.deb
Size/MD5 checksum: 38198 6ca537558089e41ebbdea7c90f2e4fd4
http://security.debian.org/pool/updates/main/p/postfix/postfix-pcre_2.3.8-2etch1_sparc.deb
Size/MD5 checksum: 37906 746615a2cc165a0fcb5aff5be073e289
http://security.debian.org/pool/updates/main/p/postfix/postfix-mysql_2.3.8-2etch1_sparc.deb
Size/MD5 checksum: 38058 ac84629509e45bf424752e4852e175e1
http://security.debian.org/pool/updates/main/p/postfix/postfix-cdb_2.3.8-2etch1_sparc.deb
Size/MD5 checksum: 36106 55d00480a61daa52578d69081a4e93a6
http://security.debian.org/pool/updates/main/p/postfix/postfix_2.3.8-2etch1_sparc.deb
Size/MD5 checksum: 1080776 87ff76ea63ba069b769b3491fac51670
http://security.debian.org/pool/updates/main/p/postfix/postfix-ldap_2.3.8-2etch1_sparc.deb
Size/MD5 checksum: 42910 767373c92a53b62640e69b16749f1fcc


These files will probably be moved into the stable distribution on
its next update.

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For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show ' and http://packages.debian.org/
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"


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