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[{"id":483,"title":"Self-taught through trial and error","votes":548,"type":"x","order":1,"pct":78.51,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.3,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.87,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.32,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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98
Ls Advisories Redhat Esm H240
Price Tag 1security advisoryRed Hat Linuxcritical

Red Hat Linux 6.x-7.0 RHSA-2000:075-07 Critical: Usermode Exploit

Becauseprograms invoked by userhelper are not actually running setuid-root,security measures built into recent versions of glibc are not active.. ` --------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: Updated usermode packages available Advisory ID: RHSA-2000:075-07 Issue date: 2000-10-05 Updated on: 2000-11-08 Product: Red Hat Linux Keywords: usermode format-string Cross references: N/A --------------------------------------------------------------------- 1. Topic: Updated usermode packages are now available for Red Hat Linux 6.x and 7. 2. Relevant releases/architectures: Red Hat Linux 6.0 - i386, alpha, sparc Red Hat Linux 6.1 - i386, alpha, sparc Red Hat Linux 6.2 - i386, alpha, sparc Red Hat Linux 6.2EE - i386, alpha, sparc Red Hat Linux 7.0 - i386 Red Hat Linux 7.0J - i386 3. Problem description: The usermode package contains a binary (/usr/bin/userhelper), which is used to control access to programs which are to be executed as root. Because programs invoked by userhelper are not actually running setuid-root, security measures built into recent versions of glibc are not active. If one of these programs supports internationalized text messages, a malicious user can use the LANG or LC_ALL environment variables (which are inherited by userhelper and, in turn, any programs it runs) to create a format-string exploit in these programs. These updated packages also fix a problem due to an incorrect path specification in the /usr/bin/shutdown wrapper script and close a potential security vulnerability in the userhelper binary. 4. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. 5. Bug IDs fixed ( for more info): 18046 - Another security hole in usermode/glibc 19034 - shutdown wrapper references non-existent /usr/sbin/shutdown 20160 - shutdown script contains call to /usr/sbin/shutdown, whichdoesn't exist 20027 - /usr/sbin/userhelper dies in segmentation fault 6. RPMs required: Red Hat Linux 6.0: sparc: i386: alpha: sources: Red Hat Linux 6.1: alpha: sparc: i386: sources: Red Hat Linux 6.2: alpha: sparc: i386: sources: Red Hat Linux 7.0: i386: sources: 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 3310677ae7403c683e7947cd86b19344 6.0/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.0/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.0/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.0/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.0/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.0/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.0/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.0/sparc/usermode-1.37-1.6.sparc.rpm 3310677ae7403c683e7947cd86b19344 6.1/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.1/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.1/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.1/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.1/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.1/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.1/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.1/sparc/usermode-1.37-1.6.sparc.rpm 3310677ae7403c683e7947cd86b19344 6.2/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.2/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.2/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.2/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.2/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.2/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.2/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.2/sparc/usermode-1.37-1.6.sparc.rpm ede9b759a01552a261c67ebf0238794a 7.0/SRPMS/usermode-1.37-2.src.rpm c32888b6f362b04f8a3805d4465c042a 7.0/i386/usermode-1.37-2.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: You can verify each package with the following command: rpm --checksig If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg 8. References: N/A Copyright(c) 2000 Red Hat, Inc. `. Updated user control modules for Red Hat Linux focusing on mitigating security weaknesses and risks via userhelper privilege adjustments.. usermode exploit, access control update, red hat security. . Severity: Critical. LinuxSecurity.com Team

Calendar 2 Nov 10, 2000 •Critical Red Hat
98
Ls Advisories Redhat Esm H240
Price Tag 1security advisoryRed Hat Linuxcritical

Red Hat Linux: RHSA-2000:075-07 Critical Usermode Format Issue

A malicious user can use the LANG or LC_ALL environment variable to create a format-string exploit.. ` --------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: Updated usermode packages available Advisory ID: RHSA-2000:075-07 Issue date: 2000-10-05 Updated on: 2000-11-08 Product: Red Hat Linux Keywords: usermode format-string Cross references: N/A --------------------------------------------------------------------- 1. Topic: Updated usermode packages are now available for Red Hat Linux 6.x and 7. 2. Relevant releases/architectures: Red Hat Linux 6.0 - i386, alpha, sparc Red Hat Linux 6.1 - i386, alpha, sparc Red Hat Linux 6.2 - i386, alpha, sparc Red Hat Linux 6.2EE - i386, alpha, sparc Red Hat Linux 7.0 - i386 Red Hat Linux 7.0J - i386 3. Problem description: The usermode package contains a binary (/usr/bin/userhelper), which is used to control access to programs which are to be executed as root. Because programs invoked by userhelper are not actually running setuid-root, security measures built into recent versions of glibc are not active. If one of these programs supports internationalized text messages, a malicious user can use the LANG or LC_ALL environment variables (which are inherited by userhelper and, in turn, any programs it runs) to create a format-string exploit in these programs. These updated packages also fix a problem due to an incorrect path specification in the /usr/bin/shutdown wrapper script and close a potential security vulnerability in the userhelper binary. 4. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. 5. Bug IDs fixed ( for more info): 18046 - Another security hole in usermode/glibc 19034 - shutdown wrapper references non-existent /usr/sbin/shutdown 20160 - shutdown script contains call to /usr/sbin/shutdown, which doesn't exist 20027 - /usr/sbin/userhelper dies insegmentation fault 6. RPMs required: Red Hat Linux 6.0: sparc: i386: alpha: sources: Red Hat Linux 6.1: alpha: sparc: i386: sources: Red Hat Linux 6.2: alpha: sparc: i386: sources: Red Hat Linux 7.0: i386: sources: 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 3310677ae7403c683e7947cd86b19344 6.0/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.0/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.0/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.0/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.0/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.0/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.0/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.0/sparc/usermode-1.37-1.6.sparc.rpm 3310677ae7403c683e7947cd86b19344 6.1/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.1/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.1/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.1/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.1/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.1/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.1/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.1/sparc/usermode-1.37-1.6.sparc.rpm 3310677ae7403c683e7947cd86b19344 6.2/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.2/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.2/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.2/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.2/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.2/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.2/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.2/sparc/usermode-1.37-1.6.sparc.rpm ede9b759a01552a261c67ebf0238794a 7.0/SRPMS/usermode-1.37-2.src.rpm c32888b6f362b04f8a3805d4465c042a 7.0/i386/usermode-1.37-2.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: You can verify each package with the following command: rpm --checksig If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg 8. References: N/A Copyright(c) 2000 Red Hat, Inc. `. Recent usermode enhancements for Fedora Linux tackle a buffer overflow issue and bolster protective mechanisms.. Red Hat Linux, Usermode Exploit, Security Update, Format String, Package Management. . Severity: Critical. LinuxSecurity.com Team

Calendar 2 Nov 09, 2000 •Critical Red Hat
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[{"id":483,"title":"Self-taught through trial and error","votes":548,"type":"x","order":1,"pct":78.51,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.3,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.87,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.32,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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