#VU42294 Improper Authentication in Google Chrome - CVE-2013-6634

Vulnerability identifier: #VU42294

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:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-6634

CWE-ID: CWE-287

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 OneClickSigninHelper::ShowInfoBarIfPossible function in browser/ui/sync/one_click_signin_helper.cc in Google Chrome before 31.0.1650.63 uses an incorrect URL during realm validation, which allows remote attackers to conduct session fixation attacks and hijack web sessions by triggering improper sync after a 302 (aka Found) HTTP status code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Google Chrome: 31.0.1650.0 - 31.0.1650.61

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External links
https://googlechromereleases.blogspot.com/2013/12/stable-channel-update.html
https://lists.opensuse.org/opensuse-updates/2013-12/msg00090.html
https://lists.opensuse.org/opensuse-updates/2013-12/msg00096.html
https://lists.opensuse.org/opensuse-updates/2014-01/msg00042.html
https://secunia.com/advisories/56217
https://www.debian.org/security/2013/dsa-2811
https://www.securitytracker.com/id/1029442
https://code.google.com/p/chromium/issues/detail?id=307159
https://src.chromium.org/viewvc/chrome?revision=236563&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.