Input validation error in wget (Alpine package)

1) Input validation error

EUVDB-ID: #VU33335

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2010-2252

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

GNU Wget 1.12 and earlier uses a server-provided filename instead of the original URL to determine the destination filename of a download, which allows remote servers to create or overwrite arbitrary files via a 3xx redirect to a URL with a .wgetrc filename followed by a 3xx redirect to a URL with a crafted filename, and possibly execute arbitrary code as a consequence of writing to a dotfile in a home directory.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wget (Alpine package): 1.12-r0 - 1.12-r3

CPE2.3

• cpe:2.3:o:alpine:wget_alpine_package:1.12-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:o:alpine:wget_alpine_package:1.12-r2:*:*:*:*:alpine_linux:*:2.0
• cpe:2.3:o:alpine:wget_alpine_package:1.12-r3:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=dcb1288cbb075086395cc1323961146b191cfc12
https://git.alpinelinux.org/aports/commit/?id=0492cb451ea74d7980668402a22453a0f29d7027

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.