Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.10.8 |
References
- http://openwall.com/lists/oss-security/2017/04/04/8Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/97407Third Party AdvisoryVDB Entry
- 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://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/net/ipv4/piIssue TrackingPatchThird Party Advisory
- https://github.com/danieljiang0415/android_kernel_crash_pocThird Party Advisory
- https://github.com/torvalds/linux/commit/43a6684519ab0a6c52024b5e25322476cabad89Issue TrackingPatchThird Party Advisory
- https://twitter.com/danieljiang0415/status/845116665184497664Third Party Advisory
- https://usn.ubuntu.com/3754-1/
- https://www.exploit-db.com/exploits/42135/
- http://openwall.com/lists/oss-security/2017/04/04/8Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/97407Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1842
FAQ
What is CVE-2017-2671?
CVE-2017-2671 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 all...
How severe is CVE-2017-2671?
CVE-2017-2671 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-2671?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.