Input validation error in curl.haxx.se libcurl

1) Input validation error

EUVDB-ID: #VU40952

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

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

CPE2.3

• cpe:2.3:a:curl_haxx_se:libcurl:7.31.0:*:*:*:*:*:*:*
• cpe:2.3:a:curl_haxx_se:libcurl:7.32.0:*:*:*:*:*:*:*
• cpe:2.3:a:curl_haxx_se:libcurl:7.33.0:*:*:*:*:*:*:*

External links

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