[RHSA-2003:199-01] Updated unzip packages fix trojan vulnerability From: bugzilla@redhat.com To: redhat-watch-list@redhat.com Date: Tuesday 11.17.00 Message was signed with unknown key 0x650D5882. The validity of the signature cannot be verified. --------------------------------------------------------------------- Red Hat Security Advisory Synopsis: Updated unzip packages fix trojan vulnerability Advisory ID: RHSA-2003:199-01 Issue date: 2003-07-01 Updated on: 2003-07-01 Product: Red Hat Linux Keywords: unzip control characters Cross references: Obsoletes: RHSA-2002:096 CVE Names: CAN-2003-0282 --------------------------------------------------------------------- 1. Topic: Updated unzip packages resolving a vulnerability allowing arbitrary files to be overwritten are now available. 2. Relevant releases/architectures: Red Hat Linux 7.1 - i386 Red Hat Linux 7.2 - i386, ia64 Red Hat Linux 7.3 - i386 Red Hat Linux 8.0 - i386 Red Hat Linux 9 - i386 3. Problem description: The unzip utility is used for manipulating archives, which are multiple files stored inside of a single file. A vulnerabilitiy in unzip version 5.50 and earlier allows attackers to overwrite arbitrary files during archive extraction by placing invalid (non-printable) characters between two "." characters. These non-printable characters are filtered, resulting in a ".." sequence. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0282 to this issue. This erratum includes a patch ensuring that non-printable characters do not make it possible for a malicious .zip file to write to parent directories unless the "-:" command line parameter is specified. Users of unzip are advised to upgrade to these updated packages, which are not vulnerable to this issue. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. To update all RPMs for your particular architecture, run: rpm -Fvh [filenames] where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory *only* contains the desired RPMs. Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 97301 - vulnerability in unzip 5.50 allows malicious zip file to write to ../ 6. RPMs required: Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/unzip-5.50-11.src.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/unzip-5.50-11.i386.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/unzip-5.50-11.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/unzip-5.50-11.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/unzip-5.50-11.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/unzip-5.50-11.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/unzip-5.50-11.i386.rpm Red Hat Linux 8.0: SRPMS: ftp://updates.redhat.com/8.0/en/os/SRPMS/unzip-5.50-12.src.rpm i386: ftp://updates.redhat.com/8.0/en/os/i386/unzip-5.50-12.i386.rpm Red Hat Linux 9: SRPMS: ftp://updates.redhat.com/9/en/os/SRPMS/unzip-5.50-14.src.rpm i386: ftp://updates.redhat.com/9/en/os/i386/unzip-5.50-14.i386.rpm 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 627c65d2643152f360a4b7f8ebacf993 7.1/en/os/SRPMS/unzip-5.50-11.src.rpm c37b3635f768ca248ef6486f38a4cfb1 7.1/en/os/i386/unzip-5.50-11.i386.rpm 627c65d2643152f360a4b7f8ebacf993 7.2/en/os/SRPMS/unzip-5.50-11.src.rpm c37b3635f768ca248ef6486f38a4cfb1 7.2/en/os/i386/unzip-5.50-11.i386.rpm e1cb9d0c5312667c601e3a04e160ea3c 7.2/en/os/ia64/unzip-5.50-11.ia64.rpm 627c65d2643152f360a4b7f8ebacf993 7.3/en/os/SRPMS/unzip-5.50-11.src.rpm c37b3635f768ca248ef6486f38a4cfb1 7.3/en/os/i386/unzip-5.50-11.i386.rpm b06d287ae9708615d9c8201addd84ceb 8.0/en/os/SRPMS/unzip-5.50-12.src.rpm 14e662c115aab0fd073602a2637c306a 8.0/en/os/i386/unzip-5.50-12.i386.rpm da4837981a5363b178185c3d53bfe3f5 9/en/os/SRPMS/unzip-5.50-14.src.rpm 12b5697f11ad09959e9f51d570c37268 9/en/os/i386/unzip-5.50-14.i386.rpm These packages are GPG signed by Red Hat for security. Our key is available from http://www.redhat.com/security/keys.html You can verify each package with the following command: rpm --checksig -v <filename> If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: md5sum <filename> 8. References: http://marc.theaimsgroup.com/?l=bugtraq&m=105259038503175 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0282 9. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at http://www.redhat.com/solutions/security/news/contact.html Copyright 2003 Red Hat, Inc. End of signed message
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