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SecuriTeam  Beyond Security  SecuriTeam Home  Ask the Team  Mailing Lists  Advertising Info  Blogs  Black Box Testing  Vulnerability Assessment  Vulnerability Scanner SecuriTeam in Your Inbox   E-mail this article to a friend New vulnerability? New tool? Tell us	New cron packages released (Security update) 18 Nov. 2000    Summary The version of Vixie Cron shipped with Debian GNU/Linux 2.2 is vulnerable to a local attack, discovered by Michal Zalewski. Several problems, including insecure permissions on temporary files and race conditions in their deletion, allowed attacks from a denial of service (preventing the editing of crontabs) to an escalation of privileges (when another user edited their crontab).   Credit: The information has been provided by Debian security announce.    Details Protect your website! Use an External Vulnerability Scanner! Nothing to install. First report in 1 hour! www.beyondsecurity.com/vulnerability-scanner Problem Description: We already described this problem in detailed in our previous article: Vixie cron fopen() and preserved umask vulnerability. Solution: As a temporary fix, "chmod go-rx /var/spool/cron/crontabs" prevents the only available exploit; however, it does not address the problem. Debian recommends upgrading to version 3.0pl1-57.1, for Debian 2.2, or 3.0pl1-61, for Debian unstable. Also, in the new cron packages, it is no longer possible to specify special files (devices, named pipes, etc.) by name to crontab. Note that this is not so much a security fix as a sanity check. Patch: Debian GNU/Linux 2.1 alias slink Slink is no longer being supported by the Debian Security Team. Debian highly recommends an upgrade to the current stable release. Debian GNU/Linux 2.2 (stable) alias potato Fixes are currently available for the Alpha, ARM, Intel ia32, Motorola 680x0, PowerPC and Sun SPARC architectures, and will be included in 2.2r2. Source archives: http://security.debian.org/dists/potato/updates/main/source/cron_3.0pl1-57.1.diff.gz http://security.debian.org/dists/potato/updates/main/source/cron_3.0pl1-57.1.dsc http://security.debian.org/dists/potato/updates/main/source/cron_3.0pl1.orig.tar.gz Alpha architecture: http://security.debian.org/dists/potato/updates/main/binary-alpha/cron_3.0pl1-57.1_alpha.deb ARM architecture: http://security.debian.org/dists/potato/updates/main/binary-arm/cron_3.0pl1-57.1_arm.deb Intel IA32 architecture: http://security.debian.org/dists/potato/updates/main/binary-arm/cron_3.0pl1-57.1_i386.deb Motorola 680x0 architecture: http://security.debian.org/dists/potato/updates/main/binary-m68k/cron_3.0pl1-57.1_m68k.deb PowerPC architecture: http://security.debian.org/dists/potato/updates/main/binary-powerpc/cron_3.0pl1-57.1_powerpc.deb Sun Sparc architecture: http://security.debian.org/dists/potato/updates/main/binary-sparc/cron_3.0pl1-57.1_sparc.deb  Comments:  Add new comment:  Subject:  Name/Nick/Email:          Chars Left:	All Sections Security News Unix focus Exploits Tools Windows focus Security Reviews  Related Articles PHP dba_replace() Arbitrary File Destruction VLC Media Player RealText Processing Stack Overflow Vulnerability LibSPF2 DNS TXT Record Parsing Bug GNU Enscript "setfilename" Special Escape Buffer Overflow File-Find-Object Format String Vulnerability Veritas Storage Foundation Arbitrary File Read Vulnerability Sun Solstice AdminSuite sadmind adm_build_path() Buffer Overflow Vulnerability Apache Tomcat Information Disclosure (RemoteFilterValve) Apple CUPS HP-GL/2 filter Code Execution Vulnerability WordPress MU wpmu-Blogs.php Crose Site Scrpting Vulnerability strongSwan IKEv2 Denial of Service Vulnerability Cross-Site Scripting Filter Evasion in Various Frameworks / Applications MySQL Charset Truncation Vulnerability Wordpress user_login Column SQL Truncation Vulnerability Joomla Weak Random Password Reset Token Vulnerability  Featured Articles Hacking SOHO Routers LibSPF2 DNS TXT Record Parsing Bug Vulnerability in Server Service Allows Code Execution (MS08-067) Opera Stored Cross Site Scripting Vulnerability GearSoftware Powered Products Local Privilege Escalation (IopfCompleteRequest) Vulnerabilities in Microsoft Excel Allows Code Execution (MS08-057) VMware Emulation Flaw x64 Guest Privilege Escalation
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