Privilege escalation in sysstat

Published: 2018-11-26 | Updated: 2018-11-27

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-19416 CVE-2018-19517
CWE-ID	CWE-121 CWE-125
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	sysstat Client/Desktop applications / Other client software
Vendor	GODARD Sebastien

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU16063

Risk: Low

CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-19416

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to out-of-bounds read in the remap_struct function in sa_common.c during a memmove call. A local attacker can control src and n of memmove, trigger stack-based buffer overflow and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

sysstat: 12.1.1

External links

http://bugzilla.redhat.com/show_bug.cgi?id=1652728

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) Out-of-bounds read

EUVDB-ID: #VU16068