CVE-2015-7548

openstack-nova: Unprivileged API user can access host data using instance snapshot

Severity Score

3.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

OpenStack Compute (Nova) before 2015.1.3 (kilo) and 12.0.x before 12.0.1 (liberty), when using libvirt to spawn instances and use_cow_images is set to false, allow remote authenticated users to read arbitrary files by overwriting an instance disk with a crafted image and requesting a snapshot.

OpenStack Compute (Nova) en versiones anteriores a 2015.1.3 (kilo) y 12.0.x en versiones anteriores a 12.0.1 (liberty), cuando se utiliza libvirt para producir instancias y use_cow_images se establece en false, permite a usuarios remotos autenticados leer archivos arbitrarios sobrescribiendo una instancia de disco con una imagen manipulada y solicitando una instantánea.

A flaw was discovered in the OpenStack Compute (nova) snapshot feature when using the libvirt driver. A compute user could overwrite an attached instance disk with a malicious header specifying a backing file, and then request a snapshot, causing a file from the compute host to be leaked. This flaw only affects LVM or Ceph setups, or setups using filesystem storage with "use_cow_images = False".

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Complete

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-09-29 CVE Reserved
2016-01-11 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CAPEC

References (5)

URL	Tag	Source
http://www.securityfocus.com/bid/80176	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2016-0018.html	2018-11-16
https://security.openstack.org/ossa/OSSA-2016-001.html	2018-11-16
https://access.redhat.com/security/cve/CVE-2015-7548	2016-01-11
https://bugzilla.redhat.com/show_bug.cgi?id=1290511	2016-01-11

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openstack Search vendor "Openstack"		Nova Search vendor "Openstack" for product "Nova"				>= 12.0.0 < 12.0.1 Search vendor "Openstack" for product "Nova" and version " >= 12.0.0 < 12.0.1"		-		Affected
Openstack Search vendor "Openstack"		Nova Search vendor "Openstack" for product "Nova"				>= 2015.1.0 < 2015.1.3 Search vendor "Openstack" for product "Nova" and version " >= 2015.1.0 < 2015.1.3"		-		Affected