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Red Hat RHSA-2001:110-05 Critical: Setserial Insecure Temp File Advisory

The initscript distributed with the setserial package (which is not installed or enabled by default) uses predictable temporary file names, and should not be used. setserial-2.17-4 and earlier versions are affected. . ` --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Insecure setserial initscript Advisory ID: RHSA-2001:110-05 Issue date: 2001-09-12 Updated on: 2001-09-19 Product: Red Hat Linux Keywords: setserial initscript temporary file Cross references: Obsoletes: --------------------------------------------------------------------- 1. Topic: The initscript distributed with the setserial package (which is not installed or enabled by default) uses predictable temporary file names, and should not be used. setserial-2.17-4 and earlier versions are affected. If you have not recompiled your kernel, this issue does not affect you. To check if you are affected by this issue, use the following command: /bin/ls /etc/rc.d/init.d/serial If this gives the output '/etc/rc.d/init.d/serial' then the initscript has been manually installed. In this case use the following command: /sbin/modprobe -l | grep '/serial.o' If this command gives output, you are affected by this issue. 2. Relevant releases/architectures: 3. Problem description: The setserial package comes with an initscript in the documentation directory. If this initscript is manually copied into the init.d directory structure and enabled, and the kernel is recompiled to have modular serial port support, then the initscript will use a predictable temporary file name. There are a number of other bugs that also prevent the initscript from working correctly in this situation (detailed in bugzilla bug #52862). 4. Solution: Do not use the initscript supplied with setserial. To disable it, use the following command: /sbin/chkconfig serialoff Alternatively, if your system needs manual adjustment of its serial port settings and you wish to have those adjustments re-applied automatically on boot, be sure to use a kernel that has non-modular serial port support, such as those supplied by Red Hat, Inc. 5. Bug IDs fixed ( for more info): 6. RPMs required: 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 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: Bugzilla bug #52862, at: https://bugzilla.redhat.com/show_bug.cgi Copyright(c) 2000, 2001 Red Hat, Inc. ` . Investigating a critical flaw within the Red Hat setserial initialization script, which raises security issues due to the generation of predictable temporary files.. Red Hat Security, Insecure Script Advisory, Setserial Vulnerability. . Severity: Critical. LinuxSecurity.com Team

Oct 16, 2023 •Critical Red Hat