SB2016112811 - Improper access control in Linux kernel net
Published: November 28, 2016
Security Bulletin ID
SB2016112811
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2016-8645)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper access control error within the tcp_v6_do_rcv() function in net/ipv6/tcp_ipv6.c, within the tcp_add_backlog() and nf_reset() functions in net/ipv4/tcp_ipv4.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1393904
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.10
- https://github.com/torvalds/linux/commit/ac6e780070e30e4c35bd395acfe9191e6268bdd3
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ac6e780070e30e4c35bd395acfe9191e6268bdd3
- http://www.openwall.com/lists/oss-security/2016/11/11/3
- http://www.securityfocus.com/bid/94264
- http://www.openwall.com/lists/oss-security/2016/11/30/3
- http://www.securitytracker.com/id/1037285
- https://access.redhat.com/errata/RHSA-2017:2669
- https://access.redhat.com/errata/RHSA-2017:2077
- https://access.redhat.com/errata/RHSA-2017:1842