Re: [SECURITY] [DSA 1571-1] New openssl packages fix predictable random number generator
Hallo,
Für die deutschsprachigen Nutzer, hier eine Information aus der
Security-Ecke [1], die für einige Nutzer sicherlich von Interesse ist.
Mit dem Update des openssl-Pakets ist es leider nicht getan.
Im Kern [2]:
Durch einen Programmierfehler in einem Debian-spezifischen Patch
arbeitete der Zufallszahlengenerator in OpenSSL seit
Paketversion 0.9.8c-1 vorhersagbar, wodurch auch "kryptografisches
Schlüsselmaterial" vorhersagbar wurde. Das schließt SSH-, OpenVPN-
und DNSSEC-Schlüssel, Schlüsselmaterial für X.509 Zertifikate und
Session-Schlüssel für SSL/TLS-Verbindungen ein. Schlüssel, die
mit GnuPG oder GNUTLS erzeugt wurden, gelten nicht als anfällig.
Damit ist jedes Schlüsselmaterial (s.o.), das mit einer verwundbaren
Version erstellt wurde (für Etch bis Paketversion 0.9.8c-4etch3, für
Lenny/Sid bis 0.9.8g-9) potentiell unsicher und es wird dringend
empfohlen, das gesamte Material (Schlüssel/Zertifikate) neu zu erzeugen.
Ein kleines Perl-Skript
<http://security.debian.org/project/extra/dowkd/dowkd.pl.gz>
<http://security.debian.org/project/extra/dowkd/dowkd.pl.gz.asc>
(OpenPGP-Signatur)
soll/kann helfen, verwundbares Material aufzuspüren.
Weiterhin müssen alle DSA-Schlüssel, die auf verwundbaren Systemen zum
Signieren oder Authentifizieren benutzt wurden, als kompromittiert
angesehen werden.
Wie gesagt: Das Projekt empfiehlt jedem, verwundbares oder
möglicherweise kompromittiertes Schlüsselmaterial neu zu erzeugen.
PS: Nicht wundern, wenn der SSH-Zugang zu Maschinen des Debian-Projects
(inkl. Alioth) im Moment nicht funktioniert [3].
[1] http://lists.debian.org/debian-security-announce/2008/msg00152.html
[2] Falls jemand mit dieser Materie besser vertraut ist, könnte er bitte
die Mail komplett übersetzen?
[3] http://lists.debian.org/debian-infrastructure-announce/2008/05/msg00000.html
MfG Daniel
Folgend die originale Mail:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> - ------------------------------------------------------------------------
> Debian Security Advisory DSA-1571-1 security@debian.org
> http://www.debian.org/security/ Florian Weimer
> May 13, 2008 http://www.debian.org/security/faq
> - ------------------------------------------------------------------------
>
> Package : openssl
> Vulnerability : predictable random number generator
> Problem type : remote
> Debian-specific: yes
> CVE Id(s) : CVE-2008-0166
>
> Luciano Bello discovered that the random number generator in Debian's
> openssl package is predictable. This is caused by an incorrect
> Debian-specific change to the openssl package (CVE-2008-0166). As a
> result, cryptographic key material may be guessable.
>
> This is a Debian-specific vulnerability which does not affect other
> operating systems which are not based on Debian. However, other systems
> can be indirectly affected if weak keys are imported into them.
>
> It is strongly recommended that all cryptographic key material which has
> been generated by OpenSSL versions starting with 0.9.8c-1 on Debian
> systems is recreated from scratch. Furthermore, all DSA keys ever used
> on affected Debian systems for signing or authentication purposes should
> be considered compromised; the Digital Signature Algorithm relies on a
> secret random value used during signature generation.
>
> The first vulnerable version, 0.9.8c-1, was uploaded to the unstable
> distribution on 2006-09-17, and has since propagated to the testing and
> current stable (etch) distributions. The old stable distribution
> (sarge) is not affected.
>
> Affected keys include SSH keys, OpenVPN keys, DNSSEC keys, and key
> material for use in X.509 certificates and session keys used in SSL/TLS
> connections. Keys generated with GnuPG or GNUTLS are not affected,
> though.
>
> A detector for known weak key material will be published at:
>
> <http://security.debian.org/project/extra/dowkd/dowkd.pl.gz>
> <http://security.debian.org/project/extra/dowkd/dowkd.pl.gz.asc>
> (OpenPGP signature)
>
> Instructions how to implement key rollover for various packages will be
> published at:
>
> <http://www.debian.org/security/key-rollover/>
>
> This web site will be continously updated to reflect new and updated
> instructions on key rollovers for packages using SSL certificates.
> Popular packages not affected will also be listed.
>
> In addition to this critical change, two other vulnerabilities have been
> fixed in the openssl package which were originally scheduled for release
> with the next etch point release: OpenSSL's DTLS (Datagram TLS,
> basically "SSL over UDP") implementation did not actually implement the
> DTLS specification, but a potentially much weaker protocol, and
> contained a vulnerability permitting arbitrary code execution
> (CVE-2007-4995). A side channel attack in the integer multiplication
> routines is also addressed (CVE-2007-3108).
>
> For the stable distribution (etch), these problems have been fixed in
> version 0.9.8c-4etch3.
>
> For the unstable distribution (sid) and the testing distribution
> (lenny), these problems have been fixed in version 0.9.8g-9.
>
> We recommend that you upgrade your openssl package and subsequently
> regenerate any cryptographic material, as outlined above.
>
> 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
> - -------------------------------
>
> Source archives:
>
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3.dsc
> Size/MD5 checksum: 1099 5e60a893c9c3258669845b0a56d9d9d6
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c.orig.tar.gz
> Size/MD5 checksum: 3313857 78454bec556bcb4c45129428a766c886
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3.diff.gz
> Size/MD5 checksum: 55320 f0e457d6459255da86f388dcf695ee20
>
> alpha architecture (DEC Alpha)
>
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_alpha.deb
> Size/MD5 checksum: 1025954 d82f535b49f8c56aa2135f2fa52e7059
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_alpha.deb
> Size/MD5 checksum: 4558230 399adb0f2c7faa51065d4977a7f3b3c4
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_alpha.deb
> Size/MD5 checksum: 2620892 0e5efdec0a912c5ae56bb7c5d5d896c6
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_alpha.deb
> Size/MD5 checksum: 2561650 affe364ebcabc2aa33ae8b8c3f797b5e
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_alpha.udeb
> Size/MD5 checksum: 677172 5228d266c1fc742181239019dbad4c42
>
> amd64 architecture (AMD x86_64 (AMD64))
>
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_amd64.deb
> Size/MD5 checksum: 1654902 d8ad8dc51449cf6db938d2675789ab25
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_amd64.deb
> Size/MD5 checksum: 891102 2e97e35c44308a59857d2e640ddf141a
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_amd64.deb
> Size/MD5 checksum: 992248 82193ea11b0bc08c74a775039b855a05
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_amd64.deb
> Size/MD5 checksum: 2178610 fb7c53e5f157c43753db31885ff68420
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_amd64.udeb
> Size/MD5 checksum: 580250 7fb3d7fee129cc9a4fb21f5c471dfbab
>
> arm architecture (ARM)
>
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_arm.deb
> Size/MD5 checksum: 1537440 c5ab48e9bde49ba32648fb581b90ba18
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_arm.udeb
> Size/MD5 checksum: 516576 84385b137c731de3b86824c17affa9f3
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_arm.deb
> Size/MD5 checksum: 2049882 7ed60840eb3e6b26c6856dcaf5776b0c
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_arm.deb
> Size/MD5 checksum: 1011698 abfa887593089ac0f1cd4e31154897ee
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_arm.deb
> Size/MD5 checksum: 805912 a605625ea107252e9aebbc77902a63ed
>
> hppa architecture (HP PA RISC)
>
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_hppa.deb
> Size/MD5 checksum: 1585900 2cbe55764db351dc6c3c2d622aa90caf
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_hppa.deb
> Size/MD5 checksum: 2248328 664fb0992b786ce067a7d878056fc191
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_hppa.deb
> Size/MD5 checksum: 1030782 21f445c541d5e5b7c16de1db9ee9d681
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_hppa.deb
> Size/MD5 checksum: 945144 c1092f3bb94d920d0beaa372c9cab04e
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_hppa.udeb
> Size/MD5 checksum: 631132 76339119275786b5e80a7a1b4cd26b71
>
> i386 architecture (Intel ia32)
>
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_i386.deb
> Size/MD5 checksum: 2086512 eeef437fb87ad6687cd953d5951aa472
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_i386.deb
> Size/MD5 checksum: 5584696 6d364557c9d392bb90706e049860be66
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_i386.deb
> Size/MD5 checksum: 1000832 ed5668305f1e4b4e4a22fbd24514c758
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_i386.udeb
> Size/MD5 checksum: 554676 dbad0172c990359282884bac1d141034
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_i386.deb
> Size/MD5 checksum: 2717086 361fde071d18ccf93338134357ab1a61
>
> ia64 architecture (Intel ia64)
>
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_ia64.udeb
> Size/MD5 checksum: 801748 05b29fc674311bd31fe945036a08abd5
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_ia64.deb
> Size/MD5 checksum: 1192192 56be85aceb4e79e45f39c4546bfecf4f
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_ia64.deb
> Size/MD5 checksum: 2593418 f9edaea0a86c1a1cea391f890d7ee70f
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_ia64.deb
> Size/MD5 checksum: 1569418 4b2cb04d13efabdddddbd0f6d3cefd9b
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_ia64.deb
> Size/MD5 checksum: 1071156 e1f487c4310ad526c071f7483de4cd1a
>
> mips architecture (MIPS (Big Endian))
>
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_mips.deb
> Size/MD5 checksum: 1003816 f895a8bc714e9c373ee80f736b5af00b
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_mips.deb
> Size/MD5 checksum: 2262266 004484e816d4fe5ff03fe6d7df38d7b7
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_mips.deb
> Size/MD5 checksum: 1692606 e8273f5d123f892a81a155f14ba19b50
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_mips.deb
> Size/MD5 checksum: 875558 44074bce1cde4281c5abcf45817f429d
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_mips.udeb
> Size/MD5 checksum: 580130 b6b810d1c39164747e3ebc9df4903974
>
> mipsel architecture (MIPS (Little Endian))
>
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_mipsel.udeb
> Size/MD5 checksum: 566168 97963ca9b6ada94445fb25b3126655e9
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_mipsel.deb
> Size/MD5 checksum: 992712 41c2bbe984553d693f21c3ec349ea465
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_mipsel.deb
> Size/MD5 checksum: 2255558 3c63936cd511975291b4230bef1a2e3b
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_mipsel.deb
> Size/MD5 checksum: 860506 d580fbeed6efd734245ea7a7bed225bb
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_mipsel.deb
> Size/MD5 checksum: 1649300 3315d1406f995f5b6d2a4f958976a794
>
> powerpc architecture (PowerPC)
>
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_powerpc.deb
> Size/MD5 checksum: 1002022 b2749639425c3a8ac493e072cfffb358
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_powerpc.deb
> Size/MD5 checksum: 895460 e15fbbbbcfe17e82bacc07f6febd9707
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_powerpc.udeb
> Size/MD5 checksum: 585320 61488ea7f54b55a21f7147fe5bc3b0f0
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_powerpc.deb
> Size/MD5 checksum: 1728384 539ee1a3fe7d9b89034ebfe3c1091b6f
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_powerpc.deb
> Size/MD5 checksum: 2210792 82e9e27c6083a95c76c5817f9604178f
>
> s390 architecture (IBM S/390)
>
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_s390.udeb
> Size/MD5 checksum: 643008 4861c78ea63b6c3c08c22a0c5326d981
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_s390.deb
> Size/MD5 checksum: 1632976 01d289d460622382b59d07950305764f
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_s390.deb
> Size/MD5 checksum: 951404 d92bb390489bed0abff58f7a1ceade6b
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_s390.deb
> Size/MD5 checksum: 1014308 487c24f2af25797a857814af7c9c0d0b
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_s390.deb
> Size/MD5 checksum: 2193782 f1fe472c802e929a57bd8c8560bd3009
>
> sparc architecture (Sun SPARC/UltraSPARC)
>
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8-dbg_0.9.8c-4etch3_sparc.deb
> Size/MD5 checksum: 4091340 970453ebfab8152c9c44ae210fbaa2a4
> http://security.debian.org/pool/updates/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4etch3_sparc.udeb
> Size/MD5 checksum: 539054 7be1258f74165c4b037e202d2048f8ce
> http://security.debian.org/pool/updates/main/o/openssl/openssl_0.9.8c-4etch3_sparc.deb
> Size/MD5 checksum: 1010536 6444d6cc6fd838c82716462aacd1cf84
> http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_0.9.8c-4etch3_sparc.deb
> Size/MD5 checksum: 2108000 ab0d0ccc72764a26b7767cace520b269
> http://security.debian.org/pool/updates/main/o/openssl/libssl0.9.8_0.9.8c-4etch3_sparc.deb
> Size/MD5 checksum: 2126386 61ddc204ee650cdd0f2b56e358134e2b
>
>
> These files will probably be moved into the stable distribution on
> its next update.
>
> - ---------------------------------------------------------------------------------
> 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 <pkg>' and http://packages.debian.org/<pkg>
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