Cryptographic issues in noVNC

1) Cryptographic issues

EUVDB-ID: #VU40842

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 - Cryptographic Issues

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:kanaka:novnc:0.4:*:*:*:*:*:*:*

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

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.