Buffer overflow in wget (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU18143

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-5953

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when handling Internationalized Resource Identifiers (IRI) during recursive downloading. A remote attacker can trick the victim to connect to a malicious web server, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wget (Alpine package): 1.12-r0 - 1.20.2-r0

CPE2.3

• cpe:2.3:o:alpine:wget_alpine_package:1.20-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:wget_alpine_package:1.20.1-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:wget_alpine_package:1.19.5-r0:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=4fe04b973fbbc21f35cf3ca46fff4bbbee15ca96
http://git.alpinelinux.org/aports/commit/?id=bc0c71befeb178f24f4348fe7f0482a969b89b82
http://git.alpinelinux.org/aports/commit/?id=c2ba5a1156a3f4249ccfee03ae2de7e1e7f8e5a6
http://git.alpinelinux.org/aports/commit/?id=e307d117a71c3d0d1da9d4f86f8723ed4cce91f7
http://git.alpinelinux.org/aports/commit/?id=d7d8dcb792fc6267eccd6cfce264b8e7ed020aa1

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.