From: TurboLinux Security Team <security@www1.turbolinux.com> To: tl-security-announce@www1.turbolinux.com Subject: [TL-Security-Announce] TLSA2001019 kernel-2.2.18-10.3 Date: Fri, 18 May 2001 15:52:28 -0700 (PDT) -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 _____________________________________________________________________________________________ Turbolinux Security Announcement Package: kernel Vulnerable Packages: All Turbolinux versions previous to 2.2.18-2 Date: 05/18/2001 5:00 PDT Affected Turbolinux platforms: TL 6.5 Server, TL 6.1 Workstation, All Turbolinux versions 6.0.5 and earlier Turbolinux Advisory ID#: TLSA2001019 Credits: Thanks go to Chris Evans and OpenWall References: http://www.linux.org.uk/VERSION/relnotes.2219.html http://www.securityportal.com/topnews/weekly/linux.html _____________________________________________________________________________________________ Several security holes have been discovered and fixed in the kernel packages. Please update the packages in your installation as soon as possible. _____________________________________________________________________________________________ 1. Problem Summary a. Ptrace/execve race condition An attacker can manipulate a setuid process that uses ptrace, thereby allowing root access. This problem was thought to have been fixed in a previous kernel patch, but apparently it was not. b. Sysctl() Kernel Information Leakage Vulnerability From the Securityfocus.com advisory, #2364: The sysctl() call allows a privileged program to read or write kernel parameters. However, underprivileged programs can utilize this function call because the call will accept signed values. Hence, it is possible for an attacker to reach below the threshold memory address set for system security by supplying negative values. This would enable him to browse kernel information, potentially giving him administrative access. c. binfmt_misc binfmt_misc touched user pages directly and could be exploited. d. CPIA driver An off by one buffer check in the CPIA driver allowed users to scribble into kernel memory e. CPUID and MSR drivers Unloading and reloading these could cause a crash due to missing unregister calls. Normally not exploitable but if set to autoload and unload they could be abused. f. Classifier Fix a possible hang in the classifier code. g. get/setsockopt Mishandling of sign bits in setsockopt and getsockopt allowed local DoS and other attacks. h. SYS5 shared memory A code path existed where the shm code would scribble on very recently freed memory. It is not clear that this was actually exploitable. i. User access asm bug on x86 Certain obscure constant copies came out copying the wrong number of bytes. No known exploit or actual problem case is known but it potentially existed. j. UDP Deadlock A local user could deadlock the kernel due to bugs in UDP port allocation. 2. Solution Update each package from our ftp server by running the following command: rpm -Uvh ftp_path_to_filename Where ftp_path_to_filename is the following: Note: Please update the packages in the order listed below: ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-BOOT-2.2.18-10.3.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-doc-2.2.18-10.3.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-extramodules-2.2.18-10.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-utils-2.2.18-10.3.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-headers-2.2.18-10.3.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-ibcs-2.2.18-10.3.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-pcmcia-cs-2.2.18-10.3.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-source-2.2.18-10.3.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-smp-2.2.18-10.3.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/kernel-2.2.18-10.3.i386.rpm The source RPM can be downloaded here: ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/kernel-2.2.18-10.3.src.rpm **Note: You must rebuild and install the RPM if you choose to download and install the SRPM. Simply installing the SRPM alone WILL NOT CLOSE THE SECURITY HOLE. Please verify the MD5 checksums of the updates before you install: MD5 sum Package Name - --------------------------------------------------------------------------------------------- 5b4a4c2ac06a2479a562fca01991fe74 kernel-2.2.18-10.3.i386.rpm 22bc47854607e0d5e04080898178d2e3 kernel-BOOT-2.2.18-10.3.i386.rpm fe8900046323a73436ec82adb85e2b1a kernel-doc-2.2.18-10.3.i386.rpm c8acccc7e3c041fb3322be5b92612889 kernel-extramodules-2.2.18-10.i386.rpm f74efedbf5617a03182431e0156abf66 kernel-headers-2.2.18-10.3.i386.rpm 963d95342008f22f1d2c9047f295e567 kernel-ibcs-2.2.18-10.3.i386.rpm 41e25d4268cf638fbef50df525b117d1 kernel-pcmcia-cs-2.2.18-10.3.i386.rpm 218fe6840a9f6fe068d771bf638f87a2 kernel-smp-2.2.18-10.3.i386.rpm ae393a256d96ba4ae073952ac23e2e23 kernel-source-2.2.18-10.3.i386.rpm 4b316041c196f7dfc35a7153e16cad2f kernel-utils-2.2.18-10.3.i386.rpm e6c0d9d0fe7d8372f78c70a265f8f1c9 kernel-2.2.18-10.3.src.rpm _____________________________________________________________________________________________ These packages are GPG signed by Turbolinux for security. Our key is available here: http://www.turbolinux.com/security/tlgpgkey.asc To verify a package, use the following command: rpm --checksig name_of_rpm To examine only the md5sum, use the following command: md5sum name_of_rpm **Note: Checking GPG keys requires RPM 3.0 or higher. ________________________________________________________________________________________________ You can find more updates on our ftp server: ftp://ftp.turbolinux.com/pub/updates/6.0/security/ for TL6.x Workstation and Server security updates Our webpage for security announcements: http://www.turbolinux.com/security If you want to report vulnerabilities, please contact: security@turbolinux.com ________________________________________________________________________________________________ Subscribe to the Turbolinux Security Mailing lists: TL-security - A moderated list for discussing security issues Turbolinux products. Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security TL-security-announce - An announce-only mailing list for security updates and alerts. Subscribe at: http://www.turbolinux.com/mailman/listinfo/tl-security-announce -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (GNU/Linux) Comment: pgpenvelope 2.10.0 - http://pgpenvelope.sourceforge.net/ iD8DBQE7Bae9cpw52/ZatwoRAmI0AJ9U19bD9Vl0cJzv/9SNn7FXfcb3rQCfX+iY vWfb43HOIReCmna3qM37ank= =VzMQ -----END PGP SIGNATURE----- _______________________________________________ TL-Security-Announce mailing list TL-Security-Announce@www.turbolinux.com http://www.turbolinux.com/mailman/listinfo/tl-security-announce