Use After Free Affecting kernel-bootwrapper package, versions <0:3.10.0-862.2.3.el7
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Test your applications- Snyk ID SNYK-RHEL7-KERNELBOOTWRAPPER-4777667
- published 26 Jul 2021
- disclosed 24 Nov 2017
Introduced: 24 Nov 2017
CVE-2017-16939 Open this link in a new tabHow to fix?
Upgrade RHEL:7 kernel-bootwrapper to version 0:3.10.0-862.2.3.el7 or higher.
This issue was patched in RHSA-2018:1318.
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 XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.
References
- http://www.securityfocus.com/bid/101954
- https://access.redhat.com/security/cve/CVE-2017-16939
- https://www.debian.org/security/2018/dsa-4082
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2
- https://blogs.securiteam.com/index.php/archives/3535
- https://bugzilla.suse.com/show_bug.cgi?id=1069702
- http://seclists.org/fulldisclosure/2017/Nov/40
- https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df2
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
- https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
- https://access.redhat.com/errata/RHSA-2018:1318
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
- https://www.exploit-db.com/exploits/44049