Vulnerability identifier: #VU12976

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-1123

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
procps
Client/Desktop applications / Software for system administration

Vendor: procps-ng

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

The weakness exists due to ps mmap()s its output buffer and mprotect()s its last page with PROT_NONE (an effective guard page). A remote attacker can trick the victim into opening a specially crafted input, overflow the output buffer of ps and cause the service to crash.

Mitigation
Update to version 3.3.15.

Vulnerable software versions

procps: All versions

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External links
http://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

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.