Improper Neutralization of HTTP Headers for Scripting Syntax in curl (Alpine package)

1) Improper Neutralization of HTTP Headers for Scripting Syntax

EUVDB-ID: #VU29290

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8177

CWE-ID: CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax

Exploit availability: No

Description

The vulnerability allows a remote attacker to overwrite files on the victim's system.

The vulnerability exists due to a logical error when processing Content-Disposition: HTTP response header in curl when executed with the -J flag and -i flags in the same command line. A remote attacker can trick the victim to run a specially crafted curl command against a malicious website and overwrite files on the user's system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

curl (Alpine package): 7.21.1-r0 - 7.70.0-r2

curl (Alpine package):

CPE2.3

• cpe:2.3:o:alpine:curl_alpine_package:7.70.0-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:curl_alpine_package:7.70.0-r1:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:curl_alpine_package:7.69.1-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:curl_alpine_package::*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=6159078bc4d89ad55278438f77391a0e1068caad

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.