Linux Foundation Xen up to 4.3.0 Initialization arch/x86/traps.c information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Foundation Xen. This impacts an unknown function of the file arch/x86/traps.c of the component Initialization Handler. The manipulation results in information disclosure. This vulnerability was named CVE-2013-4368. There is no available exploit. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Foundation Xen (Virtualization Software). Affected is an unknown function of the file arch/x86/traps.c of the component Initialization Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests to obtain sensitive information (hypervisor stack content) via unspecified vectors related to stale data in a segment register.

The weakness was presented 10/10/2013 by Matthew Daley and Coverty Scan as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability is traded as CVE-2013-4368 since 06/12/2013. The attack needs to be approached locally. The successful exploitation requires a authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 70549 (Fedora 19 : xen-4.2.3-4.fc19 (2013-19048)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora 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 xsa67 is able to eliminate this problem.

The vulnerability is also documented in the databases at X-Force (87799), Tenable (70549), SecurityFocus (BID 62930†), OSVDB (98290†) and Vulnerability Center (SBV-42119†). See VDB-10531, VDB-10532, VDB-10665 and VDB-10666 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Nessus ID: 70549
Nessus Name: Fedora 19 : xen-4.2.3-4.fc19 (2013-19048)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881811
OpenVAS Name: CentOS Update for kernel CESA-2013:1449 centos5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: xsa67

Timelineinfo

06/12/2013 🔍
10/10/2013 +120 days 🔍
10/15/2013 +5 days 🔍
10/17/2013 +2 days 🔍
10/17/2013 +0 days 🔍
10/23/2013 +6 days 🔍
10/29/2013 +6 days 🔍
05/26/2021 +2766 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: seclists.org
Researcher: Matthew Daley, Coverty Scan
Status: Not defined

CVE: CVE-2013-4368 (🔍)
GCVE (CVE): GCVE-0-2013-4368
GCVE (VulDB): GCVE-100-10668

OVAL: 🔍

X-Force: 87799
SecurityFocus: 62930
OSVDB: 98290
Vulnerability Center: 42119 - Citrix XenServer and XenSource Xen Local Information Disclosure Vulnerability Via Unspecified Vectors, Low

See also: 🔍

Entryinfo

Created: 10/15/2013 10:14
Updated: 05/26/2021 16:28
Changes: 10/15/2013 10:14 (76), 05/14/2017 09:51 (1), 05/26/2021 16:28 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:B58:103

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