#VU42015 Cryptographic issues in Google Chrome - CVE-2013-6659

Vulnerability identifier: #VU42015

Vulnerability 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-2013-6659

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Google Chrome
Client/Desktop applications / Web browsers

Vendor: Google

Description

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

The SSLClientSocketNSS::Core::OwnAuthCertHandler function in net/socket/ssl_client_socket_nss.cc in Google Chrome before 33.0.1750.117 does not prevent changes to server X.509 certificates during renegotiations, which allows remote SSL servers to trigger use of a new certificate chain, inconsistent with the user's expectations, by initiating a TLS renegotiation.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Google Chrome: 33.0.1750.0 - 33.0.1750.115

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External links
https://googlechromereleases.blogspot.com/2014/02/stable-channel-update_20.html
https://lists.opensuse.org/opensuse-updates/2014-03/msg00006.html
https://www.debian.org/security/2014/dsa-2883
https://code.google.com/p/chromium/issues/detail?id=306959
https://src.chromium.org/viewvc/chrome?revision=229611&view=revision

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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.