#VU40842 Cryptographic issues in noVNC - CVE-2013-7436

Vulnerability identifier: #VU40842

Vulnerability risk: Medium

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

CVE-ID: CVE-2013-7436

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
noVNC
Other software / Other software solutions

Vendor: kanaka (Joel Martin)

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

noVNC before 0.5 does not set the secure flag for a cookie in an https session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an http session.

Mitigation
Install update from vendor's website.

Vulnerable software versions

noVNC: 0.4

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External links
https://rhn.redhat.com/errata/RHSA-2015-0788.html
https://rhn.redhat.com/errata/RHSA-2015-0833.html
https://rhn.redhat.com/errata/RHSA-2015-0834.html
https://rhn.redhat.com/errata/RHSA-2015-0884.html
https://www.openwall.com/lists/oss-security/2015/02/17/1
https://www.openwall.com/lists/oss-security/2015/03/12/13
https://bugzilla.redhat.com/show_bug.cgi?id=1193451
https://github.com/kanaka/noVNC/commit/ad941faddead705cd611921730054767a0b32dcd

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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.