Use After Free Affecting kernel-rt-devel package, versions <0:3.10.0-693.17.1.rt56.636.el7
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL7-KERNELRTDEVEL-4796977
- published26 Jul 2021
- disclosed20 Sept 2017
Introduced: 20 Sep 2017
CVE-2017-15649 (opens in a new tab)How to fix?
Upgrade RHEL:7 kernel-rt-devel to version 0:3.10.0-693.17.1.rt56.636.el7 or higher.
This issue was patched in RHSA-2018:0152.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-devel package and not the kernel-rt-devel package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
net/packet/af_packet.c in the Linux kernel before 4.13.6 allows local users to gain privileges via crafted system calls that trigger mishandling of packet_fanout data structures, because of a race condition (involving fanout_add and packet_do_bind) that leads to a use-after-free, a different vulnerability than CVE-2017-6346.
References
- http://www.securityfocus.com/bid/101573
- https://access.redhat.com/security/cve/CVE-2017-15649
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=008ba2a13f2d04c947adc536d19debb8fe66f110
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4971613c1639d8e5f102c4e797c3bf8f83a5a69e
- http://patchwork.ozlabs.org/patch/813945/
- http://patchwork.ozlabs.org/patch/818726/
- https://blogs.securiteam.com/index.php/archives/3484
- https://github.com/torvalds/linux/commit/008ba2a13f2d04c947adc536d19debb8fe66f110
- https://github.com/torvalds/linux/commit/4971613c1639d8e5f102c4e797c3bf8f83a5a69e
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6
- https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
- https://access.redhat.com/errata/RHSA-2018:0152
- https://usn.ubuntu.com/3754-1/
- https://www.exploit-db.com/exploits/44053