Input validation error in curl.haxx.se libcurl

1) Input validation error

EUVDB-ID: #VU40952

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-8151

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The darwinssl_connect_step1 function in lib/vtls/curl_darwinssl.c in libcurl 7.31.0 through 7.39.0, when using the DarwinSSL (aka SecureTransport) back-end for TLS, does not check if a cached TLS session validated the certificate when reusing the session, which allows man-in-the-middle attackers to spoof servers via a crafted certificate. <a href="http://cwe.mitre.org/data/definitions/295.html">CWE-295: Improper Certificate Validation</a>

Mitigation

Install update from vendor's website.

Vulnerable software versions

libcurl: 7.31.0 - 7.39

External links

http://curl.haxx.se/docs/adv_20150108A.html
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10743
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
http://secunia.com/advisories/61925
http://security.gentoo.org/glsa/201701-47
http://support.apple.com/kb/HT205031

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.