qemu up to 0.11.0 improper authentication

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in qemu up to 0.11.0 and classified as problematic. This issue affects some unknown processing. The manipulation leads to improper authentication. This vulnerability is listed as CVE-2011-0011. There is no available exploit. It is advisable to introduce extra authentication.

Detailsinfo

A vulnerability was found in qemu up to 0.11.0 (Virtualization Software) and classified as problematic. This issue affects an unknown part. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

qemu-kvm before 0.11.0 disables VNC authentication when the password is cleared, which allows remote attackers to bypass authentication and establish VNC sessions.

The weakness was presented 01/04/2011 by Petr Matousek (Website). It is possible to read the advisory at bugs.launchpad.net. The identification of this vulnerability is CVE-2011-0011. The exploitation is known to be difficult. The attack needs to be done within the local network. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 68227 (Oracle Linux 6 : qemu-kvm (ELSA-2011-0345)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 155468 (Oracle Enterprise Linux Update for qemu-kvm (ELSA-2011-0345)).

Upgrading to version 0.1.1 eliminates this vulnerability. It is possible to mitigate the problem by adding an authentication mechanism. The best possible mitigation is suggested to be adding authentication.

The vulnerability is also documented in the databases at Tenable (68227), SecurityFocus (BID 45743†), OSVDB (70992†) and Vulnerability Center (SBV-29861†). See VDB-61046, VDB-61045 and VDB-61044 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 68227
Nessus Name: Oracle Linux 6 : qemu-kvm (ELSA-2011-0345)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 69572
OpenVAS Name: Debian Security Advisory DSA 2230-1 (qemu-kvm)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Authentication
Status: 🔍

0-Day Time: 🔍

Upgrade: qemu 0.1.1

Timelineinfo

12/07/2010 🔍
01/04/2011 +28 days 🔍
01/10/2011 +5 days 🔍
01/10/2011 +0 days 🔍
02/07/2011 +28 days 🔍
02/21/2011 +13 days 🔍
06/21/2012 +486 days 🔍
07/12/2013 +386 days 🔍
03/23/2015 +619 days 🔍
01/20/2025 +3591 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2011:0345
Researcher: Petr Matousek
Status: Confirmed

CVE: CVE-2011-0011 (🔍)
GCVE (CVE): GCVE-0-2011-0011
GCVE (VulDB): GCVE-100-61043

OVAL: 🔍

X-Force: 65215
SecurityFocus: 45743 - QEMU KVM VNC Password Security Bypass Vulnerability
Secunia: 42830
OSVDB: 70992 - QEMU Empty VNC Password Authentication Bypass
Vulnerability Center: 29861 - QEMU VNC Server Remote Infoemation Disclosure Vulnerability, High

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 01/20/2025 02:26
Changes: 03/23/2015 16:50 (62), 03/16/2017 15:30 (10), 12/04/2021 09:00 (6), 12/04/2021 09:04 (2), 12/04/2021 09:08 (2), 01/20/2025 02:26 (22)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!