Use After Free Affecting kernel-rt package, versions <0:3.10.0-693.5.2.rt56.626.el7
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Test your applications- Snyk ID SNYK-RHEL7-KERNELRT-4810566
- published 26 Jul 2021
- disclosed 9 Jul 2017
Introduced: 9 Jul 2017
CVE-2017-11176 Open this link in a new tabHow to fix?
Upgrade RHEL:7 kernel-rt to version 0:3.10.0-693.5.2.rt56.626.el7 or higher.
This issue was patched in RHSA-2017:2931.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact.
References
- http://www.securityfocus.com/bid/99919
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f991af3daabaecff34684fd51fac80319d1baad1
- https://github.com/torvalds/linux/commit/f991af3daabaecff34684fd51fac80319d1baad1
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
- https://access.redhat.com/security/cve/CVE-2017-11176
- http://www.debian.org/security/2017/dsa-3927
- http://www.debian.org/security/2017/dsa-3945
- https://www.exploit-db.com/exploits/45553/
- https://access.redhat.com/errata/RHSA-2017:2931
- https://www.exploit-db.com/exploits/45553