Out-of-bounds read in Linux kernel - CVE-2016-9755
Published: December 28, 2016 / Updated: August 13, 2018
Vulnerability identifier: #VU90373
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-9755
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to an out-of-bounds read error within the ipv6_defrag() function in net/ipv6/netfilter/nf_defrag_ipv6_hooks.c, within the nf_ct_frag6_gather() function in net/ipv6/netfilter/nf_conntrack_reasm.c. A local user can execute arbitrary code.
Affected software
Linux kernel
Fedora
kernel
Fedora
kernel
How to mitigate CVE-2016-9755
Install update from vendor's website.
Linux kernel - update to 4.9
kernel - addressed in versions 4.8.12-100.fc23, 4.8.12-200.fc24, 4.8.12-300.fc25
kernel - addressed in versions 4.8.12-100.fc23, 4.8.12-200.fc24, 4.8.12-300.fc25
External References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa
- http://www.openwall.com/lists/oss-security/2016/12/01/10
- http://www.securityfocus.com/bid/94626
- https://bugzilla.redhat.com/show_bug.cgi?id=1400904
- https://github.com/torvalds/linux/commit/9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa
- https://groups.google.com/forum/#!topic/syzkaller/GFbGpX7nTEo
- https://www.spinics.net/lists/netdev/msg407525.html