#VU22772 Out-of-bounds read in rsyslog - CVE-2019-17040

Vulnerability identifier: #VU22772

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-17040

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
rsyslog
Server applications / Other server solutions

Vendor: rsyslog.com

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists in "contrib/pmdb2diag/pmdb2diag.c" due to a boundary condition when the level length is mishandled. A remote attacker can trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

rsyslog: 8.1908.0

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External links
https://github.com/rsyslog/rsyslog/blob/v8-stable/ChangeLog
https://github.com/rsyslog/rsyslog/pull/3875

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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.