Use-after-free vulnerability in the nfqnl_zcopy function in net/netfilter/nfnetlink_queue_core.c in the Linux kernel through 3.13.6 allows attackers to obtain sensitive information from kernel memory by leveraging the absence of a certain orphaning operation. NOTE: the affected code was moved to the skb_zerocopy function in net/core/skbuff.c before the vulnerability was announced.
CVSS Severity (version 2.0):
Impact Subscore: 2.9
Exploitability Subscore: 5.5
CVSS Version 2 Metrics:
Access Vector: Local network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because
they may have information that would be of interest to you. No inferences should be drawn on account of other sites
being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose.
NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further,
NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about
this page to email@example.com.
[linux-kernel] 20140320 [PATCH v3] core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors
[oss-sec] 20140320 CVE request -- kernel: net: potential information leak when ubuf backed skbs are skb_zerocopy()ied
[oss-security] 20140320 Re: CVE request -- kernel: net: potential information leak when ubuf backed skbs are skb_zerocopy()ied