CVE-2016-9793

Description

The sock_setsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option.

References

https://github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290

https://bugzilla.redhat.com/show_bug.cgi?id=1402013

http://www.openwall.com/lists/oss-security/2016/12/03/1

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bc8c431e3ceb4b26b0dfc8db509518fb290

http://www.securityfocus.com/bid/94655

https://source.android.com/security/bulletin/2017-03-01.html

http://www.securitytracker.com/id/1037968

https://github.com/xairy/kernel-exploits/tree/master/CVE-2016-9793

https://access.redhat.com/errata/RHSA-2017:0933

https://access.redhat.com/errata/RHSA-2017:0932

https://access.redhat.com/errata/RHSA-2017:0931

Details

Risk Information

CVSS v2

CVSS v3