CVE Catalog

CVE-2017-1000111

High
Published: Translated: NVD NIST

Summary

The Linux kernel has a heap out-of-bounds vulnerability in AF_PACKET sockets. This issue is analogous to the previously disclosed CVE-2016-8655, where a socket option changing socket state may race with safety checks.

Risk Assessment

This vulnerability may be exploitable by attackers, posing a risk to systems using PF_PACKET sockets. With user namespaces enabled, any process can create a namespace in which it has CAP_NET_RAW privileges.

Recommendation

It is recommended to lock the socket during updates to minimize risk. Additionally, monitor and restrict access to CAP_NET_RAW privileges in process namespaces.

Other vulnerabilities in Linux kernel

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Original NVD description (English source)

Linux kernel: heap out-of-bounds in AF_PACKET sockets. This new issue is analogous to previously disclosed CVE-2016-8655. In both cases, a socket option that changes socket state may race with safety checks in packet_set_ring. Previously with PACKET_VERSION. This time with PACKET_RESERVE. The solution is similar: lock the socket for the update. This issue may be exploitable, we did not investigate further. As this issue affects PF_PACKET sockets, it requires CAP_NET_RAW in the process namespace. But note that with user namespaces enabled, any process can create a namespace in which it has CAP_NET_RAW.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS