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.
8.3	$0-$5k	0.00

A vulnerability classified as critical was found in Linux Foundation Xen (Virtualization Software). This vulnerability affects the function REPORT LUNS of the component SCSI Reporting. The manipulation of the argument device_model_args as part of a 256 Attached Devices leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the SCSI implementation in QEMU, as used in Xen, when a SCSI controller has more than 256 attached devices, allows local users to gain privileges via a small transfer buffer in a REPORT LUNS command.

The weakness was released 10/02/2013 as XSA-65 as confirmed mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability was named CVE-2013-4344 since 06/12/2013. The exploitation appears to be difficult. The attack needs to be approached locally. Required for exploitation is a single authentication. Technical details and also a public exploit are known. The advisory points out:

Only Xen systems whose administrators have deliberately configured HVM guests to have emulated SCSI controllers, and where those guests are provided with more than 256 devices, are vulnerable. We are not aware of any such systems.

After immediately, there has been an exploit disclosed. It is possible to download the exploit at seclists.org. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 75249 (openSUSE Security Update : qemu (openSUSE-SU-2014:0200-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195782 (Ubuntu Security Notification for Qemu, Qemu-kvm Vulnerabilities (USN-2092-1)).

The mailinglist post contains the following remark:

Please refer to the advisories and information from the Qemu project.

The vulnerability is also documented in the databases at X-Force (87651) and Tenable (75249). Entries connected to this vulnerability are available at 10502 and 10674.

Productinfo

Type

• Virtualization Software

Vendor

• Linux Foundation

Name

• Xen

Version

• 3.0.2
• 3.0.3
• 3.0.4
• 3.1.3
• 3.1.4
• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.3.0
• 3.3.1
• 3.3.2
• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3
• 4.3.0
• 25588

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.3

VulDB Base Score: 8.8
VulDB Temp Score: 8.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 75249
Nessus Name: openSUSE Security Update : qemu (openSUSE-SU-2014:0200-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 702932
OpenVAS Name: Debian Security Advisory DSA 2932-1 (qemu - security update
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

06/12/2013 🔍
10/02/2013 +112 days 🔍
10/02/2013 +0 days 🔍
10/02/2013 +0 days 🔍
10/04/2013 +2 days 🔍
10/04/2013 +0 days 🔍
10/16/2013 +12 days 🔍
06/13/2014 +240 days 🔍
05/26/2021 +2539 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-65
Status: Confirmed

CVE: CVE-2013-4344 (🔍)
OVAL: 🔍

X-Force: 87651
Vulnerability Center: 41981 - QEMU and XenSource Xen Local Privilege Escalation Vulnerability via a Malicious REPORT LUNS Command, Medium
SecurityFocus: 62773
OSVDB: 98028

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 10/04/2013 16:48
Updated: 05/26/2021 09:10
Changes: 10/04/2013 16:48 (82), 05/13/2017 10:41 (1), 05/26/2021 09:10 (3)
Complete: 🔍

Discussion

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