Buffer overflow in curl (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU33022

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-9586

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

curl before version 7.52.0 is vulnerable to a buffer overflow when doing a large floating point output in libcurl's implementation of the printf() functions. If there are any application that accepts a format string from the outside without necessary input filtering, it could allow remote attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

curl (Alpine package): 7.19.6-r0 - 7.52.0-r0

CPE2.3

• cpe:2.3:o:alpine:curl_alpine_package:7.19.6-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:o:alpine:curl_alpine_package:7.19.7-r0:*:*:*:*:alpine_linux:*:1.10
• cpe:2.3:o:alpine:curl_alpine_package:7.21.1-r0:*:*:*:*:alpine_linux:*:2.0

External links

https://git.alpinelinux.org/aports/commit/?id=7079fe21530ae1c8147925d8b591131b786ab2e9
https://git.alpinelinux.org/aports/commit/?id=619d9f8608068fab555a9a54e6154eb798eb5c2c
https://git.alpinelinux.org/aports/commit/?id=09397ff9b9dd0d5668c3eac94b18bf725cc0cb0d
https://git.alpinelinux.org/aports/commit/?id=8a5e3005b1e698bb2e3052f1ed638086620775f7
https://git.alpinelinux.org/aports/commit/?id=3aa892ac421bfd2d826eae84932f3edcbfade015

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.