Out-of-bounds write in nrpe (Alpine package)

1) Out-of-bounds write

EUVDB-ID: #VU48931

Risk: Medium

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

CVE-ID: CVE-2020-6582

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Nagios NRPE 3.2.1 has a Heap-Based Buffer Overflow, as demonstrated by interpretation of a small negative number as a large positive number during a bzero call.

Mitigation

Install update from vendor's website.

Vulnerable software versions

nrpe (Alpine package): 3.2.1-r0 - 3.2.1-r2

CPE2.3

• cpe:2.3:a:alpine:nrpe_alpine_package:3.2.1-r0:*:*:*:*:alpine_linux:*:3.9
• cpe:2.3:a:alpine:nrpe_alpine_package:3.2.1-r1:*:*:*:*:alpine_linux:*:3.9
• cpe:2.3:a:alpine:nrpe_alpine_package:3.2.1-r2:*:*:*:*:alpine_linux:*:3.9

External links

https://git.alpinelinux.org/aports/commit/?id=01b1c95659941056bc9ea4bee6501ff84ac003ad

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.