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3.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Linux Foundation Xen and classified as problematic. Impacted is an unknown function of the component I/O Instruction Emulator. Such manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2013-4355. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Foundation Xen (Virtualization Software). Affected by this issue is an unknown code of the component I/O Instruction Emulator. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

Xen 4.3.x and earlier does not properly handle certain errors, which allows local HVM guests to obtain hypervisor stack memory via a (1) port or (2) memory mapped I/O write or (3) other unspecified operations related to addresses without associated memory.

The advisory summarizes:

Xen 3.2.x and later are vulnerable. Xen 3.1.x and earlier have not been inspected.

The weakness was disclosed 09/30/2013 with Coverity Scan Project as XSA-63 as confirmed mailinglist post (oss-sec). The advisory is shared for download at seclists.org. The public release has been coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2013-4355 since 06/12/2013. The attack needs to be approached locally. A simple authentication is needed for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 71305 (Scientific Linux Security Update : kernel on SL5.x i386/x86_64), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Scientific Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370045 (Citrix XenServer Security Update (CTX139295)).

Applying the patch xsa63.patch is able to eliminate this problem. It is possible to mitigate the problem by applying the configuration setting PV Guests only. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability. The mailinglist post contains the following remark:

Running only PV guests will avoid this issue.

The vulnerability is also documented in the databases at X-Force (87565), Tenable (71305), SecurityFocus (BID 62708†), OSVDB (97955†) and Secunia (SA54838†). openwall.com is providing further details. The entries VDB-10531 and VDB-10668 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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

License

• open-source

Website

• Vendor: https://www.linuxfoundation.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 71305
Nessus Name: Scientific Linux Security Update : kernel on SL5.x i386/x86_64
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881835
OpenVAS Name: CentOS Update for kernel CESA-2013:1790 centos5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: xsa63.patch
Config: PV Guests only

Timelineinfo

06/12/2013 🔍
09/30/2013 +109 days 🔍
09/30/2013 +0 days 🔍
09/30/2013 +0 days 🔍
09/30/2013 +0 days 🔍
10/01/2013 +1 days 🔍
10/01/2013 +0 days 🔍
10/03/2013 +2 days 🔍
12/10/2013 +68 days 🔍
12/15/2013 +5 days 🔍
05/26/2021 +2719 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-63
Organization: Coverity Scan Project
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-4355 (🔍)
GCVE (CVE): GCVE-0-2013-4355
GCVE (VulDB): GCVE-100-10532

OVAL: 🔍

X-Force: 87565
SecurityFocus: 62708
Secunia: 54838 - Xen HVM Guest Hypervisor Stack Data Disclosure Weakness, Not Critical
OSVDB: 97955
Vulnerability Center: 42557 - XenSource Xen Before 4.3 and Citrix XenServer Up Until 6.2 Local Leakage of Sensitive Information (CVE-2013-4355), Low

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/03/2013 11:52
Updated: 05/26/2021 07:02
Changes: 10/03/2013 11:52 (53), 05/17/2017 08:52 (34), 05/26/2021 06:48 (4), 05/26/2021 07:02 (1)
Complete: 🔍
Cache ID: 216:E70:103

Discussion

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