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Red Hat Linux 7.1 RHSA-2003:199-02 Moderate: Unzip File Overwrite

Updated unzip packages resolving a vulnerability allowing arbitrary filesto be overwritten are now available.. ` --------------------------------------------------------------------- Red Hat Security Advisory Synopsis: Updated unzip packages fix trojan vulnerability Advisory ID: RHSA-2003:199-02 Issue date: 2003-07-01 Updated on: 2003-08-15 Product: Red Hat Linux Keywords: unzip control charactersCross 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. [Updated 15 August 2003] Ben Laurie found that the original patch to fix this issue missed a case where the path component included a quoted slash. These updated packages contain a new patch that corrects this issue. 2. Relevant releases/architectures: Red Hat Linux 7.1 - i386 Red Hat Linux 7.1 for iSeries (64 bit) - ppc Red Hat Linux 7.1 for pSeries (64 bit) - ppc 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 vulnerableto 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 ( 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: i386: Red Hat Linux 7.1 for iSeries (64 bit): SRPMS: ppc: Red Hat Linux 7.1 for pSeries (64 bit): SRPMS: ppc: Red Hat Linux 7.2: SRPMS: i386: ia64: Red Hat Linux 7.3: SRPMS: i386: Red Hat Linux 8.0: SRPMS: i386: Red Hat Linux 9: SRPMS: i386: 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 7726fd0a5026763537b7d947e84fa8a5 7.1/en/os/SRPMS/unzip-5.50-31.src.rpm 5528f5705d056ceeda5ad97e6ade46f8 7.1/en/os/i386/unzip-5.50-31.i386.rpm 7726fd0a5026763537b7d947e84fa8a5 7.1/en/os/iSeries/SRPMS/unzip-5.50-31.src.rpm 1b56998c114550b761819d63bd5ced3e 7.1/en/os/iSeries/ppc/unzip-5.50-31.ppc.rpm 7726fd0a5026763537b7d947e84fa8a5 7.1/en/os/pSeries/SRPMS/unzip-5.50-31.src.rpm 1b56998c114550b761819d63bd5ced3e 7.1/en/os/pSeries/ppc/unzip-5.50-31.ppc.rpm 7726fd0a5026763537b7d947e84fa8a5 7.2/en/os/SRPMS/unzip-5.50-31.src.rpm 5528f5705d056ceeda5ad97e6ade46f87.2/en/os/i386/unzip-5.50-31.i386.rpm 451f973b77c2ced03d344495774cd253 7.2/en/os/ia64/unzip-5.50-31.ia64.rpm 7726fd0a5026763537b7d947e84fa8a5 7.3/en/os/SRPMS/unzip-5.50-31.src.rpm 5528f5705d056ceeda5ad97e6ade46f8 7.3/en/os/i386/unzip-5.50-31.i386.rpm a16d8797347c730ad0f2e6892f881eb3 8.0/en/os/SRPMS/unzip-5.50-32.src.rpm e708a3b370ec0febd115dca3dd4da0f4 8.0/en/os/i386/unzip-5.50-32.i386.rpm 5b4b902fde88ab017acb2c0c7f48b2c2 9/en/os/SRPMS/unzip-5.50-33.src.rpm e6d52c854a8ebba7dacb678a5edb5cb8 9/en/os/i386/unzip-5.50-33.i386.rpm These packages are GPG signed by Red Hat for security. Our key is available from Product Signing Keys - Red Hat Customer Portal You can verify each package with the following command: rpm --checksig -v 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 8. References: http://marc.theaimsgroup.com/?l=bugtraq&m=105259038503175 CVE -CVE-2003-0282 9. Contact: The Red Hat security contact is . More contact details at All Red Hat products `. Ubuntu has issued patches for tar utilities to fix a malware exploit that could allow unauthorized file modifications. Essential enhancement for safety!. Red Hat Linux, unzip, file overwrite, security update, Linux patch. . Severity: Important. LinuxSecurity.com Team

Aug 15, 2003 •Important Red Hat