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HIGH

kernel: use after free in dccp protocol

Published Feb 18, 2017

Description

The dccp_rcv_state_process function in net/dccp/input.c in the Linux kernel through 4.9.11 mishandles DCCP_PKT_REQUEST packet data structures in the LISTEN state, which allows local users to obtain root privileges or cause a denial of service (double free) via an application that makes an IPV6_RECVPKTINFO setsockopt system call.

Affected products

Remediation

Red Hat statement

This issue affects Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2 kernels. As this issue is rated as Important, it has been scheduled to be fixed in a future version of Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2 kernels.

Red Hat mitigation

Recent versions of the SELinux policy can mitigate this flaw. The steps below will work with SELinux enabled or disabled. As the DCCP module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions: # echo "install dccp /bin/true" >> /etc/modprobe.d/disable-dccp.conf The system will need to be restarted if the DCCP modules are loaded. In most circumstances, the DCCP kernel modules will be unable to be unloaded while any network interfaces are active and the protocol is in use. If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.

Metrics

Weaknesses (2)

CWE-415

CWE-416

Use After Free

References (30)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Feb 18, 2017
Updated Aug 5, 2024
Reserved Feb 17, 2017
Link CVE-2017-6074
CISA Vulnrichment
Updated n/a
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2017-6074
Red Hat
Severity Important
Public date Feb 22, 2017
Links CVE-2017-6074 - Bugzilla