Credentials management in curl (Alpine package)

1) Credentials management

EUVDB-ID: #VU33011

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

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 (Alpine package): 7.19.6-r0 - 7.50.3-r1

External links

http://git.alpinelinux.org/aports/commit/?id=e57c1f8b95e9a6aecc75e9eaae6c7bf9e259adb6
http://git.alpinelinux.org/aports/commit/?id=7079fe21530ae1c8147925d8b591131b786ab2e9
http://git.alpinelinux.org/aports/commit/?id=619d9f8608068fab555a9a54e6154eb798eb5c2c
http://git.alpinelinux.org/aports/commit/?id=69c95791ab79c2f073015b2ea7e847b27a649257
http://git.alpinelinux.org/aports/commit/?id=ba3dc3d210189d8b88c35c3b6850f54f8041f3fa
http://git.alpinelinux.org/aports/commit/?id=4cbdd0cf8c1d0c855e0d3cfb56ef02aa19716a01
http://git.alpinelinux.org/aports/commit/?id=41621bfa2c8cbc7303191ddefd9ccaa650d8b359
http://git.alpinelinux.org/aports/commit/?id=ffe6b82496f728d1d75dae4030047c6ff48a9c5a

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.