Red Hat Linux General Security Advisory

Red Hat, Inc. Security Advisory Synopsis New ncurses packages fixing buffer overrun available Advisory ID RHSA-2000:115-02 Issue Date 2000-11-23 Updated On 2000-11-26 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. 2000-11-27: Added packages for Red Hat Linux 7 for Alpha 2. 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. 3. Bug IDs fixed: (see bugzilla for more information) 20809 - ncurses allows local privilege escalation 4. 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, alpha 5. RPMs required: Red Hat Linux 6.2: alpha: ftp://updates.redhat.com/6.2/en/os/alpha/ncurses-5.0-12.alpha.rpm ftp://updates.redhat.com/6.2/en/os/alpha/ncurses-devel-5.0-12.alpha.rpm sparc: ftp://updates.redhat.com/6.2/en/os/sparc/ncurses-5.0-12.sparc.rpm ftp://updates.redhat.com/6.2/en/os/sparc/ncurses-devel-5.0-12.sparc.rpm i386: ftp://updates.redhat.com/6.2/en/os/i386/ncurses-5.0-12.i386.rpm ftp://updates.redhat.com/6.2/en/os/i386/ncurses-devel-5.0-12.i386.rpm sources: ftp://updates.redhat.com/6.2/en/os/SRPMS/ncurses-5.0-12.src.rpm Red Hat Linux 7.0: alpha: ftp://updates.redhat.com/7.0/en/os/alpha/ncurses-5.2-2.alpha.rpm ftp://updates.redhat.com/7.0/en/os/alpha/ncurses-devel-5.2-2.alpha.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/ncurses-5.2-2.i386.rpm ftp://updates.redhat.com/7.0/en/os/i386/ncurses-devel-5.2-2.i386.rpm sources: ftp://updates.redhat.com/7.0/en/os/SRPMS/ncurses-5.2-2.src.rpm 6. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. 7. Verification: MD5 sum Package Name ------------------------------------------------------------------------- 268df5613b61b146b8cae1c59369c0b7 6.2/en/os/SRPMS/ncurses-5.0-12.src.rpm 1decbd07374fd9fb7ae5a12641d2667b 6.2/en/os/alpha/ncurses-5.0-12.alpha.rpm ed52d2bad06cee2cec081bb889a5e363 6.2/en/os/alpha/ncurses-devel-5.0-12.alpha.rpm d401a0317132c114a75dfeefb881f66c 6.2/en/os/i386/ncurses-5.0-12.i386.rpm bc84ee23b1b8f960a0911a5388c52d24 6.2/en/os/i386/ncurses-devel-5.0-12.i386.rpm 654eca10b3b44afef783c39da3b254dc 6.2/en/os/sparc/ncurses-5.0-12.sparc.rpm e273dd6e88899781bcc7441e7505de5c 6.2/en/os/sparc/ncurses-devel-5.0-12.sparc.rpm 4444a46c15c28db246b191daf4f3dfde 7.0/en/os/SRPMS/ncurses-5.2-2.src.rpm 64d008bc67646bc54c3b94b84a0c63fe 7.0/en/os/alpha/ncurses-5.2-2.alpha.rpm b2b05f687584244fd0a33583d7684b25 7.0/en/os/alpha/ncurses-devel-5.2-2.alpha.rpm 9affe6c75ae33d616ea695766c10e44e 7.0/en/os/i386/ncurses-5.2-2.i386.rpm a555ec460de5650c4a2c42abc5de838c 7.0/en/os/i386/ncurses-devel-5.2-2.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/about/contact.html You can verify each package with the following command: rpm --checksig 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: rpm --checksig --nogpg filename Note that you need RPM >= 3.0 to check GnuPG keys. 8. References: N/A