Credentials management in curl.haxx.se cURL

1) Credentials management

EUVDB-ID: #VU33011

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-8616

CWE-ID: CWE-255 - Credentials Management

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

A flaw was found in curl before version 7.51.0 When re-using a connection, curl was doing case insensitive comparisons of user name and password with the existing connections. This means that if an unused connection with proper credentials exists for a protocol that has connection-scoped credentials, an attacker can cause that connection to be reused if s/he knows the case-insensitive version of the correct password.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cURL: 7.1 - 7.50.3

CPE2.3

• cpe:2.3:a:curl_haxx_se:curl:7.1:*:*:*:*:*:*:*
• cpe:2.3:a:curl_haxx_se:curl:7.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:curl_haxx_se:curl:7.2:*:*:*:*:*:*:*

External links

https://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
https://www.securityfocus.com/bid/94094
https://www.securitytracker.com/id/1037192
https://access.redhat.com/errata/RHSA-2018:2486
https://access.redhat.com/errata/RHSA-2018:3558
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8616
https://curl.haxx.se/CVE-2016-8616.patch
https://curl.haxx.se/docs/adv_20161102B.html
https://security.gentoo.org/glsa/201701-47
https://www.tenable.com/security/tns-2016-21

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.