Red Hat Bugzilla – Bug 1479304
CVE-2017-1000111 kernel: Heap out-of-bounds read in AF_PACKET sockets
Last modified: 2018-09-13 10:02:02 EDT
A race condition issue was found in the way the raw packet sockets implementation in the Linux kernel networking subsystem handled synchronization. A local user able to open a raw packet socket (requires the CAP_NET_RAW capability) could use this to waste resources in the kernels ring buffer or possibly cause a read-out-of-bounds on the heap possibly panicking the machine. In a default or common use of Red Hat Enterprise Linux 6 and 7 this issue does not allow an unprivileged local user to use this functionality. In order to exploit this issue the attacker needs CAP_NET_RAW capability, which needs to be granted by the administrator to the attacker's account. Since Red Hat Enterprise Linux does not have unprivileged user namespaces enabled by default, local unprivileged users also cannot abuse namespaces to grant this capability. Upstream patch: http://patchwork.ozlabs.org/patch/800274/
Acknowledgments: Name: Willem de Bruijn
Public via: http://seclists.org/oss-sec/2017/q3/279
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1480464]
This issue has been addressed in the following products: Red Hat Enterprise MRG 2 Via RHSA-2017:2918 https://access.redhat.com/errata/RHSA-2017:2918
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:2930 https://access.redhat.com/errata/RHSA-2017:2930
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:2931 https://access.redhat.com/errata/RHSA-2017:2931
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2017:3200 https://access.redhat.com/errata/RHSA-2017:3200
Statement: This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7, and MRG-2. Future Linux kernel updates for the respective releases may address this issue.