CVE-2017-2671 Affecting kernel package, versions <0:4.9.27-14.31.amzn1
Threat Intelligence
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-AMZN201803-KERNEL-1705680
- published27 Sept 2021
- disclosed5 Apr 2017
Introduced: 5 Apr 2017
CVE-2017-2671 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 kernel to version 0:4.9.27-14.31.amzn1 or higher.
This issue was patched in ALAS-2017-828.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2018.03 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
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=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://access.redhat.com/errata/RHSA-2017:2077
- https://access.redhat.com/errata/RHSA-2017:2669
- https://access.redhat.com/errata/RHSA-2018:1854
- https://usn.ubuntu.com/3754-1/
- https://access.redhat.com/security/cve/CVE-2017-2671
- https://bugzilla.redhat.com/show_bug.cgi?id=1436649