[oCERT 2015-012] Ganeti multiple issues

[Daniele Bianco <danbia () ocert org>]

#2015-012 Ganeti multiple issues

Description:

Ganeti, an open source virtualization manager, suffers from multiple issues in
its RESTful control interface (RAPI).

The distributed replicated storage (DRBD) secret is leaked by the RAPI
interface when job results are requested. Leveraging on the knowledge of
this secret, a malicious user who had already gained access to the storage
network of the cluster can retrieve instance data more easily and reliably.

The RAPI interface is also vulnerable to a DoS condition, triggered via SSL
parameter renegotiation issued by a malicious client. The condition leads to
resource exhaustion on the master node.

Affected version:

Ganeti <=2.9.6, <=2.10.7, <=2.11.7, <=2.12.5, <=2.13.2, <=2.14.1, <=2.15.1

Fixed version:

Ganeti >=2.9.7, >=2.10.8, >=2.11.8, >=2.12.6, >=2.13.3, >=2.14.2, >=2.15.2

Credit: vulnerability reported by Pierre Kim <pierre [dot] kim [dot] sec [at] gmail [dot] com>.

CVE:

CVE-2015-7944 (DoS), CVE-2015-7945 (DRBD secret leak) 

Timeline:

2015-12-21: vulnerability report received
2015-12-24: contacted affected vendors
2015-12-30: advisory release

References:

http://downloads.ganeti.org/releases

Permalink:

http://www.ocert.org/advisories/ocert-2015-012.html

--
  Daniele Bianco      Open Source Computer Security Incident Response Team
  <danbia () ocert org>                                  http://www.ocert.org

  GPG Key 0x9544A497
  GPG Key fingerprint = 88A7 43F4 F28F 1B9D 6F2D  4AC5 AE75 822E 9544 A497