Ubuntu update for Linux kernel (Vivid HWE)

1) Race condition

EUVDB-ID: #VU2591

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-2015-7613

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 in the IPC object implementation due to race condition. A local attacker can trigger an ipc_addid call that leads to uid and gid comparisons against uninitialized data, related to msg.c, shm.c, and util.c and gain root privileges.

Mitigation

Update the affected packages

Ubuntu 14.04 LTS:

linux-image-3.19.0-30-powerpc64-smp 3.19.0-30.34~14.04.1

linux-image-3.19.0-30-generic 3.19.0-30.34~14.04.1

linux-image-3.19.0-30-powerpc64-emb 3.19.0-30.34~14.04.1

linux-image-3.19.0-30-powerpc-smp 3.19.0-30.34~14.04.1

linux-image-3.19.0-30-generic-lpae 3.19.0-30.34~14.04.1

linux-image-3.19.0-30-lowlatency 3.19.0-30.34~14.04.1

linux-image-3.19.0-30-powerpc-e500mc 3.19.0-30.34~14.04.1

Vulnerable software versions

Ubuntu: 14.04

CPE2.3

• cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*

External links

https://www.ubuntu.com/usn/usn-2765-1/

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.