Input validation error in munin (Alpine package)

1) Input validation error

EUVDB-ID: #VU33059

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-6188

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local authenticated user to manipulate data.

Munin before 2.999.6 has a local file write vulnerability when CGI graphs are enabled. Setting multiple upper_limit GET parameters allows overwriting any file accessible to the www-data user.

Mitigation

Install update from vendor's website.

Vulnerable software versions

pam-pgsql (Alpine package): 0.7.3.1-r1 - 0.7.3.1-r3

munin (Alpine package): 2.0.25-r1

CPE2.3

• cpe:2.3:a:alpine:pam-pgsql_alpine_package:0.7.3.1-r1:*:*:*:*:alpine_linux:*:2.5
• cpe:2.3:a:alpine:pam-pgsql_alpine_package:0.7.3.1-r3:*:*:*:*:alpine_linux:*:3.5
• cpe:2.3:a:alpine:munin_alpine_package:2.0.25-r1:*:*:*:*:alpine_linux:*:3.4

External links

https://git.alpinelinux.org/aports/commit/?id=0306a37de30a5e1659c1f02b27d6153f8d71695a

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.