CVE-2016-8655 log

Source	CVE Red Hat MITRE NVD Debian Ubuntu SUSE Alpine Mageia CVE Details CIRCL Bugs Arch Linux Red Hat Gentoo SUSE GitHub Lists oss-security full-disclosure bugtraq Misc GitHub code web search
Severity	High
Remote	No
Type	Privilege escalation
Description	A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets implementation in the Linux kernel networking subsystem handled synchronization while creating the TPACKET_V3 ring buffer. A local user able to open a raw packet socket (requires the CAP_NET_RAW capability) could use this flaw to elevate their privileges on the system.

Group	Package	Affected	Fixed	Severity	Status
AVG-98	linux-zen	4.8.12-1	4.8.12-2	High	Fixed
AVG-97	linux-grsec	1:4.8.12.r201612031658-1	1:4.8.12.r201612031658-2	High	Fixed
AVG-96	linux-lts	4.4.35-1	4.4.36-1	High	Fixed
AVG-95	linux	4.8.12-1	4.8.12-2	High	Fixed

Date	Advisory	Group	Package	Severity	Type
07 Dec 2016	ASA-201612-8	AVG-98	linux-zen	High	privilege escalation
06 Dec 2016	ASA-201612-7	AVG-96	linux-lts	High	privilege escalation
06 Dec 2016	ASA-201612-6	AVG-95	linux	High	privilege escalation
06 Dec 2016	ASA-201612-5	AVG-97	linux-grsec	High	privilege escalation

References
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=84ac7260236a49c79eede91617700174c2c19b0c http://seclists.org/oss-sec/2016/q4/607

Notes
In order to exploit this issue the attacker needs CAP_NET_RAW capability, which needs to be granted by the administrator to the attacker's account. Without unprivileged user namespaces enabled, local unprivileged users also cannot abuse namespaces to grant this capability to themselves and elevate their privileges.

Notes

In order to exploit this issue the attacker needs CAP_NET_RAW capability, which needs to be granted by the administrator to the attacker's account. Without unprivileged user namespaces enabled, local unprivileged users also cannot abuse namespaces to grant this capability to themselves and elevate their privileges.