Improper Authentication in curl.haxx.se cURL

1) Improper Authentication

EUVDB-ID: #VU32242

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-7141

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

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

curl and libcurl before 7.50.2, when built with NSS and the libnsspem.so library is available at runtime, allow remote attackers to hijack the authentication of a TLS connection by leveraging reuse of a previously loaded client certificate from file for a connection for which no certificate has been set, a different vulnerability than CVE-2016-5420.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cURL: 7.50.0 - 7.50.1

CPE2.3

• cpe:2.3:a:curl_haxx_se:curl:7.50.0:*:*:*:*:*:*:*
• cpe:2.3:a:curl_haxx_se:curl:7.50.1:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-updates/2016-09/msg00094.html
https://rhn.redhat.com/errata/RHSA-2016-2575.html
https://rhn.redhat.com/errata/RHSA-2016-2957.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
https://www.securityfocus.com/bid/92754
https://www.securitytracker.com/id/1036739
https://access.redhat.com/errata/RHSA-2018:3558
https://bugzilla.redhat.com/show_bug.cgi?id=1373229
https://curl.haxx.se/docs/adv_20160907.html
https://github.com/curl/curl/commit/curl-7_50_2~32
https://lists.debian.org/debian-lts-announce/2018/11/msg00005.html
https://security.gentoo.org/glsa/201701-47

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.