CVE-2017-2671

Public Exploit

Description

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.

5.5

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.47%

Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com

Affected: n/a n/a

References

Link	Tags
http://www.securityfocus.com/bid/97407	vdb entry third party advisory
https://github.com/torvalds/linux/commit/43a6684519ab0a6c52024b5e25322476cabad893	issue tracking third party advisory patch
http://openwall.com/lists/oss-security/2017/04/04/8	third party advisory mailing list
https://access.redhat.com/errata/RHSA-2017:2669	vendor advisory
https://access.redhat.com/errata/RHSA-2018:1854	vendor advisory
https://usn.ubuntu.com/3754-1/	vendor advisory
https://twitter.com/danieljiang0415/status/845116665184497664	third party advisory
https://github.com/danieljiang0415/android_kernel_crash_poc	third party advisory
https://www.exploit-db.com/exploits/42135/	exploit
https://access.redhat.com/errata/RHSA-2017:2077	vendor advisory
https://access.redhat.com/errata/RHSA-2017:1842	vendor advisory
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/net/ipv4/ping.c?id=43a6684519ab0a6c52024b5e25322476cabad893	issue tracking third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2017-2671?: CVE-2017-2671 has been scored as a medium severity vulnerability.
How to fix CVE-2017-2671?: To fix CVE-2017-2671, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-2671 being actively exploited in the wild?: It is possible that CVE-2017-2671 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.