Heap-based buffer overflow in wget (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU8959

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-13089

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

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

The vulnerability exists due to heap-based buffer overflow in the skip_short_body() function in 'src/http.c' when processing HTTP chunk size values. A remote attacker can send specially crafted HTTP data, trigger memory corruption and execute arbitrary code with privileges of the current user.

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 - 1.18-r2

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:1.13.4-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:o:alpine:wget_alpine_package:1.14-r0:*:*:*:*:alpine_linux:*:2.5

External links

https://git.alpinelinux.org/aports/commit/?id=7293c28368ce48a6b22ed6010220211e8422023e
https://git.alpinelinux.org/aports/commit/?id=df8fbf720824642c3008a9f4bc1825ce8e84ae7d
https://git.alpinelinux.org/aports/commit/?id=de6df5d64baa025d268f3b72f4170f1b3d431e23

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.