SUSE Linux update for the Linux Kernel (Live Patch 11 for SLE 12 SP2)



Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2017-16939
CVE-2017-17712
CWE-ID CWE-416
CWE-362
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 SUSE Linux
Operating systems & Components / Operating system

Vendor SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free error

EUVDB-ID: #VU9601

Risk: Low

CVSSv4.0: 5.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2017-16939

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in the XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel due to use-after-free error. A local attacker can make a specially crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages, trigger memory corruption and cause the service to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SUSE Linux: 12

CPE2.3 External links

https://lists.opensuse.org/opensuse-security-announce/2018-01/msg00094.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. However, proof of concept for this vulnerability is available.

2) Race condition

EUVDB-ID: #VU9772

Risk: Low

CVSSv4.0: 5.9 [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-2017-17712

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to a race condition in inet->hdrincl in the raw_sendmsg() function in net/ipv4/raw.c in the Linux kernel. A local attacker can trigger uninitialized stack pointer usage and execute arbitrary code with root privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SUSE Linux: 12

CPE2.3 External links

https://lists.opensuse.org/opensuse-security-announce/2018-01/msg00094.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.



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