CVE-2017-16939

moderate-risk
Published 2017-11-24

The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.

Do I need to act?

!
10.2% chance of exploitation in next 30 days
EPSS score — higher than 90% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
44049
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Linux Debian

References (28)

Patch http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5...
Mailing List http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
Mailing List http://seclists.org/fulldisclosure/2017/Nov/40
Patch http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
Third Party Advisory http://www.securityfocus.com/bid/101954
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1318
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1355
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:1170
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:1190
Exploit https://blogs.securiteam.com/index.php/archives/3535
Issue Tracking https://bugzilla.suse.com/show_bug.cgi?id=1069702
Patch https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df...
Third Party Advisory https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
Third Party Advisory https://www.debian.org/security/2018/dsa-4082
Patch http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5...
Mailing List http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
Mailing List http://seclists.org/fulldisclosure/2017/Nov/40
Patch http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
Third Party Advisory http://www.securityfocus.com/bid/101954
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1318
and 8 more references
42
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 11/34 · Low
Exposure 7/34 · Low