Race Condition Affecting kernel-bootwrapper package, versions <0:3.10.0-693.el7
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Test your applications- Snyk ID SNYK-RHEL7-KERNELBOOTWRAPPER-5177936
- published 26 Jul 2021
- disclosed 24 Mar 2017
Introduced: 24 Mar 2017
CVE-2017-2671 Open this link in a new tabHow to fix?
Upgrade RHEL:7 kernel-bootwrapper to version 0:3.10.0-693.el7 or higher.
This issue was patched in RHSA-2017:1842.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-bootwrapper package and not the kernel-bootwrapper package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a socket system call.
References
- http://www.securityfocus.com/bid/97407
- https://github.com/torvalds/linux/commit/43a6684519ab0a6c52024b5e25322476cabad893
- https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/net/ipv4/ping.c?id=43a6684519ab0a6c52024b5e25322476cabad893
- https://access.redhat.com/security/cve/CVE-2017-2671
- https://www.exploit-db.com/exploits/42135/
- https://github.com/danieljiang0415/android_kernel_crash_poc
- https://twitter.com/danieljiang0415/status/845116665184497664
- http://openwall.com/lists/oss-security/2017/04/04/8
- https://access.redhat.com/errata/RHSA-2017:1842
- https://usn.ubuntu.com/3754-1/
- https://bugzilla.redhat.com/show_bug.cgi?id=1436649