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Red Hat Linux 6.2/7.0: RHSA-2000:115-01 Critical: Ncurses Setuid Exploit

If you are any setuid applications that use ncurses and its cursor movementfunctionality, local users may gain access to the program's privileges.. ` --------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: New ncurses packages fixing buffer overrun available Advisory ID: RHSA-2000:115-01 Issue date: 2000-11-23 Updated on: 2000-11-23 Product: Red Hat Linux Keywords: ncurses buffer overrun exploit setuid Cross references: N/A --------------------------------------------------------------------- 1. Topic: If you are any setuid applications that use ncurses and its cursor movement functionality, local users may gain access to the program's privileges. 2. Relevant releases/architectures: Red Hat Linux 6.2 - i386, alpha, sparc Red Hat Linux 6.2EE - i386, alpha, sparc Red Hat Linux 7.0 - i386 3. Problem description: There used to be an overflowable buffer in the part of the ncurses library handling cursor movement. Attackers can force a privileged application to use their own termcap file containing a special terminal entry which will trigger the ncurses vulnerability, allowing them to execute arbitrary code with the privileges of the exploited 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): 20809 - ncurses allows local privilege escalation 6. RPMs required: Red Hat Linux 6.2: alpha: sparc: i386: sources: Red Hat Linux 7.0: i386: sources: 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 268df5613b61b146b8cae1c59369c0b7 6.2/SRPMS/ncurses-5.0-12.src.rpm 1decbd07374fd9fb7ae5a12641d2667b 6.2/alpha/ncurses-5.0-12.alpha.rpm ed52d2bad06cee2cec081bb889a5e363 6.2/alpha/ncurses-devel-5.0-12.alpha.rpm d401a0317132c114a75dfeefb881f66c 6.2/i386/ncurses-5.0-12.i386.rpm bc84ee23b1b8f960a0911a5388c52d24 6.2/i386/ncurses-devel-5.0-12.i386.rpm 654eca10b3b44afef783c39da3b254dc 6.2/sparc/ncurses-5.0-12.sparc.rpm e273dd6e88899781bcc7441e7505de5c 6.2/sparc/ncurses-devel-5.0-12.sparc.rpm 4444a46c15c28db246b191daf4f3dfde 7.0/SRPMS/ncurses-5.2-2.src.rpm 9affe6c75ae33d616ea695766c10e44e 7.0/i386/ncurses-5.2-2.i386.rpm a555ec460de5650c4a2c42abc5de838c 7.0/i386/ncurses-devel-5.2-2.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. `. A significant vulnerability in ncurses could allow local privilege escalation, jeopardizing setuid applications. Secure your systems by updating promptly.. Red Hat Advisory, ncurses Security, Setuid Exploit, Software Package Update. . Severity: Critical. LinuxSecurity.com Team

Nov 26, 2000 •Critical Red Hat