Vulnerability Description
The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel before 4.10.1 has incorrect expectations about skb data layout, which allows local users to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted system calls, as demonstrated by use of the MSG_MORE flag in conjunction with loopback UDP transmission.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.0, < 4.4.52 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4ef4PatchThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.1PatchRelease NotesThird Party Advisory
- http://www.openwall.com/lists/oss-security/2017/02/28/5Mailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/96487Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1427984Issue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/ca4ef4574f1ee5252e2cd365f8f5d5bafd048f3PatchThird Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4ef4PatchThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.1PatchRelease NotesThird Party Advisory
- http://www.openwall.com/lists/oss-security/2017/02/28/5Mailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/96487Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1427984Issue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/ca4ef4574f1ee5252e2cd365f8f5d5bafd048f3PatchThird Party Advisory
FAQ
What is CVE-2017-6347?
CVE-2017-6347 is a vulnerability with a CVSS score of 7.8 (HIGH). The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel before 4.10.1 has incorrect expectations about skb data layout, which allows local users to cause a denial of service (...
How severe is CVE-2017-6347?
CVE-2017-6347 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-6347?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.