Debian alert: samba remote file append/creation problem
-----BEGIN PGP SIGNED MESSAGE----- - ------------------------------------------------------------------------ Debian Security Advisory DSA-065-1 security@debian.org http://www.debian.org/security/ Wichert Akkerman June 23, 2001 - ------------------------------------------------------------------------ Package : samba Problem type : remote file append/creation Debian-specific: no Michal Zalewski discovered that samba does not properly validate NetBIOS names from remote machines. By itself that is not a problem, except if Samba is configure to write log-files to a file that includes the NetBIOS name of the remote side by using the `%m' macro in the `log file' command. In that case an attacker could use a NetBIOS name like '../tmp/evil'. If the log-file was set to "/var/log/samba/%s" samba would them write to /var/tmp/evil. Since the NetBIOS name is limited to 15 characters and the `log file' command could have an extension to the filename the results of this are limited. However if the attacker is also able to create symbolic links on the samba server he could trick samba into appending any data he wants to all files on the filesystem which samba can write to. The Debian GNU/Linux packaged version of samba has a safe configuration and is not vulnerable. As temporary workaround for systems that are vulnerable change all occurrences of the `%m' macro in smb.conf to `%l' and restart samba. This has been fixed in version 2.0.7-3.4, and we recommend that up upgrade your samba package immediately. wget url will fetch the file for you dpkg -i file.deb will install the referenced file. Debian GNU/Linux 2.2 alias potato - --------------------------------- Potato was released for alpha, arm, i386, m68k, powerpc and sparc. Source archives: http://security.debian.org/dists/stable/updates/main/source/samba_2.0.7-3.4.diff.gz MD5 checksum: 5611001a7ed3b80214709ee1f5b433cf http://security.debian.org/dists/stable/updates/main/source/samba_2.0.7-3.4.dsc MD5 checksum: 1899ddf270b1c7422297b5725aae1cac http://security.debian.org/dists/stable/updates/main/source/samba_2.0.7.orig.tar.gz MD5 checksum: b5e61ea655d476072fd0365785fea2d0 Architecture independent archives: http://security.debian.org/dists/stable/updates/main/binary-all/samba-doc_2.0.7-3.4_all.deb MD5 checksum: 5e9e67fd0b0647945106ec4af85aec6e Alpha architecture: http://security.debian.org/dists/stable/updates/main/binary-alpha/samba-common_2.0.7-3.4_alpha.deb MD5 checksum: f978de80e3dcfdd5a08c623b365c1a88 http://security.debian.org/dists/stable/updates/main/binary-alpha/samba_2.0.7-3.4_alpha.deb MD5 checksum: 139272e3c7f6fc6643b303db996736a3 http://security.debian.org/dists/stable/updates/main/binary-alpha/smbclient_2.0.7-3.4_alpha.deb MD5 checksum: 106f37c91188799ba73f5821582cce82 http://security.debian.org/dists/stable/updates/main/binary-alpha/smbfs_2.0.7-3.4_alpha.deb MD5 checksum: 5eba972f8f5ec99b9ac31281ff93b862 http://security.debian.org/dists/stable/updates/main/binary-alpha/swat_2.0.7-3.4_alpha.deb MD5 checksum: 1fddc7995e9068fba6f509222c386b36 ARM architecture: http://security.debian.org/dists/stable/updates/main/binary-arm/samba-common_2.0.7-3.4_arm.deb MD5 checksum: 4cebf21d3d52f80250688b79d078cffe http://security.debian.org/dists/stable/updates/main/binary-arm/samba_2.0.7-3.4_arm.deb MD5 checksum: 5e98051170c741a8d982cd4eedd1ee2d http://security.debian.org/dists/stable/updates/main/binary-arm/smbclient_2.0.7-3.4_arm.deb MD5 checksum: 8968608080bf324dbab1dbca607066cd http://security.debian.org/dists/stable/updates/main/binary-arm/smbfs_2.0.7-3.4_arm.deb MD5 checksum: f57810ea2d6c7686d090ed84ccfb168f http://security.debian.org/dists/stable/updates/main/binary-arm/swat_2.0.7-3.4_arm.deb MD5 checksum: a14b4f352fdca1986d5142c8584c3d15 Intel IA-32 architecture: http://security.debian.org/dists/stable/updates/main/binary-i386/samba-common_2.0.7-3.4_i386.deb MD5 checksum: 68a2b37078da7ae8bfe494ba4406f9b7 http://security.debian.org/dists/stable/updates/main/binary-i386/samba_2.0.7-3.4_i386.deb MD5 checksum: 9e7d7b60348a4aa2d3f401e30a7078c9 http://security.debian.org/dists/stable/updates/main/binary-i386/smbclient_2.0.7-3.4_i386.deb MD5 checksum: fff14586173645b3ee81129f071ea462 http://security.debian.org/dists/stable/updates/main/binary-i386/smbfs_2.0.7-3.4_i386.deb MD5 checksum: f07facfb2938d08f76f4aef1a4ccba54 http://security.debian.org/dists/stable/updates/main/binary-i386/swat_2.0.7-3.4_i386.deb MD5 checksum: aa9665611e949b70c5157c51329f765e Motorola 680x0 architecture: http://security.debian.org/dists/stable/updates/main/binary-m68k/samba-common_2.0.7-3.4_m68k.deb MD5 checksum: db9593e35e444ede9ebe7c8583813166 http://security.debian.org/dists/stable/updates/main/binary-m68k/samba_2.0.7-3.4_m68k.deb MD5 checksum: d7df68eef17e69a52d9e6d43532f4fca http://security.debian.org/dists/stable/updates/main/binary-m68k/smbclient_2.0.7-3.4_m68k.deb MD5 checksum: 99e120404688b3834467a5d9654b5066 http://security.debian.org/dists/stable/updates/main/binary-m68k/smbfs_2.0.7-3.4_m68k.deb MD5 checksum: 414a4563a94386bdc7064fa3fa655af5 http://security.debian.org/dists/stable/updates/main/binary-m68k/swat_2.0.7-3.4_m68k.deb MD5 checksum: 1886e731d2aa8de279cdbd40c23d08cd PowerPC architecture: http://security.debian.org/dists/stable/updates/main/binary-powerpc/samba-common_2.0.7-3.4_powerpc.deb MD5 checksum: 46d0b904f84472dd446d6bc6598a7611 http://security.debian.org/dists/stable/updates/main/binary-powerpc/samba_2.0.7-3.4_powerpc.deb MD5 checksum: 79ffd3bc7f11c7a5010a36a390e254ae http://security.debian.org/dists/stable/updates/main/binary-powerpc/smbclient_2.0.7-3.4_powerpc.deb MD5 checksum: 678b59800ac66aab2744a5b4a1067494 http://security.debian.org/dists/stable/updates/main/binary-powerpc/smbfs_2.0.7-3.4_powerpc.deb MD5 checksum: 451edca1851b05a743f4c371a1b4a428 http://security.debian.org/dists/stable/updates/main/binary-powerpc/swat_2.0.7-3.4_powerpc.deb MD5 checksum: 8bf7246835c70edff54c2c106c06d41f Sun Sparc architecture: http://security.debian.org/dists/stable/updates/main/binary-sparc/samba-common_2.0.7-3.4_sparc.deb MD5 checksum: c3d1ece362929b928271e1549d618583 http://security.debian.org/dists/stable/updates/main/binary-sparc/samba_2.0.7-3.4_sparc.deb MD5 checksum: cc11c140c1d05fb59c9cf68c3b19870c http://security.debian.org/dists/stable/updates/main/binary-sparc/smbclient_2.0.7-3.4_sparc.deb MD5 checksum: a31eacb646466c408183a72b030ebfa6 http://security.debian.org/dists/stable/updates/main/binary-sparc/smbfs_2.0.7-3.4_sparc.deb MD5 checksum: f411a3651f63e466066d4f85bfb3dc6e http://security.debian.org/dists/stable/updates/main/binary-sparc/swat_2.0.7-3.4_sparc.deb MD5 checksum: 26a982c6b747338883a1be57e6fefc2d These packages will be moved into the stable distribution on its next revision. For not yet released architectures please refer to the appropriate directory ftp://ftp.debian.org/debian/dists/sid/binary-$arch/ . - -- - ---------------------------------------------------------------------------- apt-get: deb http://security.debian.org/ stable/updates main dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- Version: 2.6.3ia Charset: noconv iQB1AwUBOzSnfKjZR/ntlUftAQHWSQMArXbis7m5DB/DjiV7RsC7edB5abmq2UtK 53BjpGfHvR90ev4NqyLUWvG5oOgdN+7Kj+tKmEJtrmwzcsAquz7V3cn+PE6zD8lm gHuihX7WCvq1fpgazJgW70BdINRm/ypx =H6VV -----END PGP SIGNATURE----- |
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