SB2016050207 - Permissions, Privileges, and Access Controls in Linux kernel
Published: May 2, 2016 Updated: August 9, 2020
Security Bulletin ID
SB2016050207
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2015-2686)
The vulnerability allows a local authenticated user to execute arbitrary code.
net/socket.c in the Linux kernel 3.19 before 3.19.3 does not validate certain range data for (1) sendto and (2) recvfrom system calls, which allows local users to gain privileges by leveraging a subsystem that uses the copy_from_iter function in the iov_iter interface, as demonstrated by the Bluetooth subsystem.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4de930efc23b92ddf88ce91c405ee645fe6e27ea
- http://grsecurity.net/~spender/viro.txt
- http://twitter.com/grsecurity/statuses/579050211605102592
- http://twitter.com/grsecurity/statuses/579060953477701632
- http://twitter.com/grsecurity/statuses/579075689439059968
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.3
- http://www.openwall.com/lists/oss-security/2015/03/23/14
- http://www.securityfocus.com/bid/73286
- https://bugzilla.redhat.com/show_bug.cgi?id=1205242
- https://github.com/torvalds/linux/commit/4de930efc23b92ddf88ce91c405ee645fe6e27ea