Unchecked Error Condition Affecting kernel-rt-debug package, versions <0:3.10.0-693.rt56.617.el7
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Test your applications- Snyk ID SNYK-RHEL7-KERNELRTDEBUG-5196709
- published 26 Jul 2021
- disclosed 5 Apr 2017
Introduced: 5 Apr 2017
CVE-2017-7889 Open this link in a new tabHow to fix?
Upgrade RHEL:7 kernel-rt-debug to version 0:3.10.0-693.rt56.617.el7 or higher.
This issue was patched in RHSA-2017:2077.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
The mm subsystem in the Linux kernel through 3.2 does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism, which allows local users to read or write to kernel memory locations in the first megabyte (and bypass slab-allocation access restrictions) via an application that opens the /dev/mem file, related to arch/x86/mm/init.c and drivers/char/mem.c.
References
- http://www.securityfocus.com/bid/97690
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b8f254aa17f720053054c4ecff3920973a83b9d6
- https://access.redhat.com/security/cve/CVE-2017-7889
- http://www.debian.org/security/2017/dsa-3945
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a4866aa812518ed1a37d8ea0c881dc946409de94
- https://github.com/torvalds/linux/commit/a4866aa812518ed1a37d8ea0c881dc946409de94
- http://www.openwall.com/lists/oss-security/2017/04/16/4
- https://access.redhat.com/errata/RHSA-2017:2077
- https://usn.ubuntu.com/3583-1/
- https://usn.ubuntu.com/3583-2/