SUSE Linux update for Linux Kernel Live Patch 4 for SLE 12 SP2

1) Buffer overflow

EUVDB-ID: #VU6184

Risk: Low

CVSSv3.1: 8.1 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7184

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a local attacker to execute arbitrary code on the target system with escalated privileges.

The vulnerability exists due to boundary error in xfrm_replay_verify_len() function in net/xfrm/xfrm_user.c in Linux kernel when validating data after an XFRM_MSG_NEWAE update. A local use can trigger heap-based buffer overflow by leveraging the CAP_NET_ADMIN capability and execute arbitrary code on the target system with root privileges.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

This vulnerability was demonstrated during the Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.

Mitigation

Update the affected packages.

Vulnerable software versions

Linux kernel: 4.10.0 - 4.10.6

External links

http://lists.opensuse.org/opensuse-security-announce/2017-03/msg00059.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.