Linux Foundation Xen up to 3.2.3 Flask Hypercall numeric error

CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.09

Summaryinfo

A vulnerability classified as problematic has been found in Linux Foundation Xen up to 3.2.3. This impacts the function FLASK_GETBOOL/FLASK_SETBOOL/FLASK_USER/FLASK_CONTEXT_TO_SID of the component Flask Hypercall. Performing a manipulation results in numeric error. This vulnerability is reported as CVE-2014-1894. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Linux Foundation Xen up to 3.2.3 (Virtualization Software). It has been classified as problematic. This affects the function FLASK_GETBOOL/FLASK_SETBOOL/FLASK_USER/FLASK_CONTEXT_TO_SID of the component Flask Hypercall. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on availability. The summary by CVE is:

Multiple integer overflows in unspecified suboperations in the flask hypercall in Xen 3.2.x and earlier, when XSM is enabled, allow local users to cause a denial of service (processor fault) via unspecified vectors, a different vulnerability than CVE-2014-1891, CVE-2014-1892, and CVE-2014-1893.

The weakness was disclosed 02/10/2014 by Matthew Daley as XSA-84 as confirmed mailinglist post (Mailing List). The advisory is shared at xenbits.xenproject.org. This vulnerability is uniquely identified as CVE-2014-1894 since 02/07/2014. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 72539 (Fedora 20 : xen-4.3.1-9.fc20 (2014-2170)), 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 166935 (OpenSuSE Security Update for xen (openSUSE-SU-2014:0483-1)).

Applying the patch xsa84-4.1.patch/xsa84-4.2.patch/xsa84-unstable-4.3.patch is able to eliminate this problem.

The vulnerability is also documented in the databases at X-Force (91312), Tenable (72539), SecurityFocus (BID 65419†) and Vulnerability Center (SBV-43678†). The entries VDB-11164, VDB-12064, VDB-12235 and VDB-12236 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 72539
Nessus Name: Fedora 20 : xen-4.3.1-9.fc20 (2014-2170)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 867511
OpenVAS Name: Fedora Update for xen FEDORA-2014-2170
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: xsa84-4.1.patch/xsa84-4.2.patch/xsa84-unstable-4.3.patch

Timelineinfo

02/06/2014 🔍
02/06/2014 +0 days 🔍
02/07/2014 +1 days 🔍
02/10/2014 +3 days 🔍
02/27/2014 +17 days 🔍
03/19/2014 +20 days 🔍
04/01/2014 +13 days 🔍
06/09/2021 +2626 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-84
Researcher: Matthew Daley
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-1894 (🔍)
GCVE (CVE): GCVE-0-2014-1894
GCVE (VulDB): GCVE-100-12417

OVAL: 🔍

X-Force: 91312 - Xen suboperations denial of service, Medium Risk
SecurityFocus: 65419 - Xen XSM/Flask Hypercalls Local Integer Overflow Vulnerability
Vulnerability Center: 43678 - Xen 3.2 and Earlier Local DoS Vulnerability due to Integer Overflow in Flask Hypercalls, Medium

See also: 🔍

Entryinfo

Created: 02/27/2014 08:33
Updated: 06/09/2021 21:34
Changes: 02/27/2014 08:33 (77), 05/23/2017 08:54 (4), 06/09/2021 21:34 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:F84:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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