Security restrictions bypass in cURL

1) Improper Neutralization of HTTP Headers for Scripting Syntax

EUVDB-ID: #VU29290

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

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 updates from vendor's website.

Vulnerable software versions

cURL: 7.20.0 - 7.70.0

CPE2.3

• cpe:2.3:a:curl_haxx_se:curl:7.20.0:*:*:*:*:*:*:*
• cpe:2.3:a:curl_haxx_se:curl:7.20.1:*:*:*:*:*:*:*
• cpe:2.3:a:curl_haxx_se:curl:7.21.0:*:*:*:*:*:*:*

External links

https://curl.haxx.se/docs/CVE-2020-8177.html

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.