CVE-2017-7184

Description

The xfrm_replay_verify_len function in net/xfrm/xfrm_user.c in the Linux kernel through 4.10.6 does not validate certain size data after an XFRM_MSG_NEWAE update, which allows local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.64%

Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory kernel.org Vendor Advisory kernel.org

Affected: n/a n/a

References

Link	Tags
https://blog.trendmicro.com/results-pwn2own-2017-day-one/	third party advisory technical description
https://access.redhat.com/errata/RHSA-2017:2918	third party advisory vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=677e806da4d916052585301785d847c3b3e6186a	vendor advisory
https://access.redhat.com/errata/RHSA-2017:2931	third party advisory vendor advisory
http://www.securityfocus.com/bid/97018	vdb entry third party advisory
https://source.android.com/security/bulletin/2017-05-01	third party advisory
http://www.securitytracker.com/id/1038166	vdb entry third party advisory
https://github.com/torvalds/linux/commit/f843ee6dd019bcece3e74e76ad9df0155655d0df	third party advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f843ee6dd019bcece3e74e76ad9df0155655d0df	vendor advisory
http://www.eweek.com/security/ubuntu-linux-falls-on-day-1-of-pwn2own-hacking-competition	third party advisory technical description
https://github.com/torvalds/linux/commit/677e806da4d916052585301785d847c3b3e6186a	third party advisory
https://twitter.com/thezdi/status/842126074435665920	press/media coverage third party advisory
http://openwall.com/lists/oss-security/2017/03/29/2	third party advisory mailing list
https://access.redhat.com/errata/RHSA-2017:2930	third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:4159	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-7184?: CVE-2017-7184 has been scored as a high severity vulnerability.
How to fix CVE-2017-7184?: To fix CVE-2017-7184, 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-2017-7184 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2017-7184 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.