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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2004.0385 -- Debian Security Advisory DSA 514-1 New Linux 2.2.20 packages fix local root exploit (sparc) 07 June 2004 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-source-2.2.20 kernel-image-2.2-sparc Publisher: Debian Operating System: Debian GNU/Linux 3.0 Linux variants Platform: SPARC Impact: Root Compromise Access Required: Existing Account CVE Names: CAN-2004-0077 Ref: ESB-2004.0251 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - -------------------------------------------------------------------------- Debian Security Advisory DSA 514-1 security@debian.org http://www.debian.org/security/ Martin Schulze June 4th, 2004 http://www.debian.org/security/faq - - -------------------------------------------------------------------------- Package : kernel-source-2.2.20, kernel-image-2.2-sparc Vulnerability : failing function and TLB flush Problem-Type : local Debian-specific: no CVE ID : CAN-2004-0077 CERT advisory : VU#981222 Paul Starzetz and Wojciech Purczynski of isec.pl discovered a critical security vulnerability in the memory management code of Linux inside the mremap(2) system call. Due to flushing the TLB (Translation Lookaside Buffer, an address cache) too early it is possible for an attacker to trigger a local root exploit. The attack vectors for 2.4.x and 2.2.x kernels are exclusive for the respective kernel series, though. We formerly believed that the exploitable vulnerability in 2.4.x does not exist in 2.2.x which is still true. However, it turned out that a second (sort of) vulnerability is indeed exploitable in 2.2.x, but not in 2.4.x, with a different exploit, of course. For the stable distribution (woody) these problems have been fixed in version 9woody1 of Linux 2.2 kernel images for the sparc architecture and in version 2.2.20-5woody3 of Linux 2.2.20 source. For the unstable distribution (sid) these problems have been fixed in version 9.1 of Linux 2.2 kernel images for the sparc architecture. This problem has been fixed for other architectures already. We recommend that you upgrade your Linux kernel 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 3.0 alias woody - - -------------------------------- Source archives: http://security.debian.org/pool/updates/main/k/kernel-source-2.2.20/kernel-source-2.2.20_2.2.20-5woody3.dsc Size/MD5 checksum: 661 4eede8cde6013e6660459173dacd8e4e http://security.debian.org/pool/updates/main/k/kernel-source-2.2.20/kernel-source-2.2.20_2.2.20-5woody3.diff.gz Size/MD5 checksum: 159991 26db63a4af138d5c67c433da29778102 http://security.debian.org/pool/updates/main/k/kernel-source-2.2.20/kernel-source-2.2.20_2.2.20.orig.tar.gz Size/MD5 checksum: 19394649 57c0edf86cb23a5b215db9121c9b3557 http://security.debian.org/pool/updates/main/k/kernel-image-sparc-2.2/kernel-image-sparc-2.2_9woody1.dsc Size/MD5 checksum: 768 58d7d78f4cc97af50074cafa2322ca7c http://security.debian.org/pool/updates/main/k/kernel-image-sparc-2.2/kernel-image-sparc-2.2_9woody1.tar.gz Size/MD5 checksum: 25540 af1005c87ca491c28108fda2a66efb2c Architecture independent components: http://security.debian.org/pool/updates/main/k/kernel-source-2.2.20/kernel-doc-2.2.20_2.2.20-5woody3_all.deb Size/MD5 checksum: 1162414 d244e1206d51a785d2a298df8ffbb9e8 http://security.debian.org/pool/updates/main/k/kernel-source-2.2.20/kernel-source-2.2.20_2.2.20-5woody3_all.deb Size/MD5 checksum: 15848780 33170e34a3d4c56e910314be93f0b184 http://security.debian.org/pool/updates/main/k/kernel-image-sparc-2.2/kernel-headers-2.2.20-sparc_9woody1_all.deb Size/MD5 checksum: 1122094 e5bdced5ca4b46cffec44e531c238a56 Sun Sparc architecture: http://security.debian.org/pool/updates/main/k/kernel-image-sparc-2.2/kernel-image-2.2.20-sun4cdm_9woody1_sparc.deb Size/MD5 checksum: 1617420 3789f331d7aa2e9c10b3ffee08c82b94 http://security.debian.org/pool/updates/main/k/kernel-image-sparc-2.2/kernel-image-2.2.20-sun4dm-smp_9woody1_sparc.deb Size/MD5 checksum: 1653324 e0b6db9b869d1dd51e2a615a0eaef8a1 http://security.debian.org/pool/updates/main/k/kernel-image-sparc-2.2/kernel-image-2.2.20-sun4u_9woody1_sparc.deb Size/MD5 checksum: 2023252 50b820b56ed032a532d5e0bbff5f58b1 http://security.debian.org/pool/updates/main/k/kernel-image-sparc-2.2/kernel-image-2.2.20-sun4u-smp_9woody1_sparc.deb Size/MD5 checksum: 2066292 9144adfbf2bce6098028b69ee28658b8 These files will probably be moved into the stable distribution on its next revision. - - --------------------------------------------------------------------------------- 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> - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFAwLvEW5ql+IAeqTIRAt1ZAJ9TFcLcX0FRqCRlt9zfYPtoreIcDACfZfUn ZTpzOHmmiAjxOfIn3KoAYYY= =Vf8n - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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On call after hours for member emergencies only. -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBQMO68Ch9+71yA2DNAQLvrgP/SsFlHU9Ol0GcECeDrG3NGb5dQ1v18w7K y3p5OqWe8kBKO8xQ8tuafkcgZO0T1jiVnfyFud+oMTVl6KA9qibVZnbZS8SkBqAb 1Z2mzptW4Skj4W/c6lp4fEv1u/K8ae8+UCD0hFCSy6VJFX4ynD2/3RwiN9G6wQBC 7mZhptO8144= =mAOB -----END PGP SIGNATURE-----