Permissions, Privileges, and Access Controls in Linux kernel - CVE-2015-2686
Published: May 2, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU40325
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2015-2686
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2015-2686
Install update from vendor's website.
Sources
- 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