Resource exhaustion in python3 (Alpine package)

1) Resource exhaustion

EUVDB-ID: #VU29544

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-14422

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application improperly computes hash values in the IPv4Interface and IPv6Interface classes within the Lib/ipaddress.py in Python. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack if an application is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this attacker can cause many dictionary entries to be created.

Mitigation

Install update from vendor's website.

Vulnerable software versions

python3 (Alpine package): 3.6.9-r2

CPE2.3

• cpe:2.3:a:alpine:python3_alpine_package:3.6.9-r2:*:*:*:*:alpine_linux:*:3.9

External links

https://git.alpinelinux.org/aports/commit/?id=7772db5ac3e606fcb415309efabe1a425462cb60
https://git.alpinelinux.org/aports/commit/?id=17f08ccad8155759775705c3ce0f8ef82a912877
https://git.alpinelinux.org/aports/commit/?id=21a5b7dd0924932b20512155471ee45dada0abf4
https://git.alpinelinux.org/aports/commit/?id=05546ebd50da460f3e53d4c8df34747c56e47459
https://git.alpinelinux.org/aports/commit/?id=5fbbd588ac1a7f3a4d779fe13c37b9ab4d65e259

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.