Linux Foundation Xen up to 4.3.0 VIF Parser tools/libxl/libxlu_vif.c xlu_vif_parse_rate null pointer dereference

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3.2$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Foundation Xen 4.2.0/4.2.1/4.2.2/4.2.3/4.3.0. The impacted element is the function xlu_vif_parse_rate of the file tools/libxl/libxlu_vif.c of the component VIF Parser. Executing a manipulation can lead to null pointer dereference. This vulnerability is handled as CVE-2013-4369. There is not any exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as problematic was found in Linux Foundation Xen 4.2.0/4.2.1/4.2.2/4.2.3/4.3.0 (Virtualization Software). This vulnerability affects the function xlu_vif_parse_rate of the file tools/libxl/libxlu_vif.c of the component VIF Parser. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

The xlu_vif_parse_rate function in the libxlu library in Xen 4.2.x and 4.3.x allows local users to cause a denial of service (NULL pointer dereference) by using the "@" character as the VIF rate configuration.

The weakness was released 10/10/2013 by Matthew Daley and Coverty Scan as possible null dereference when parsing vif ratelimiting info as not defined mailinglist post (oss-sec). The advisory is available at seclists.org. This vulnerability was named CVE-2013-4369 since 06/12/2013. Local access is required to approach this attack. The requirement for exploitation is a single authentication. Technical details are known, but there is no available exploit.

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 166560 (SUSE Enterprise Linux Security update for Xen (SUSE-SU-2013:1774-1)).

Applying the patch xsa68 is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (87798), Tenable (70549), SecurityFocus (BID 62931†), OSVDB (98288†) and Vulnerability Center (SBV-42575†). Entries connected to this vulnerability are available at VDB-10665, VDB-10667, VDB-10668 and VDB-10674. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 🔍

OpenVAS ID: 867005
OpenVAS Name: Fedora Update for xen FEDORA-2013-19048
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: xsa68

Timelineinfo

06/12/2013 🔍
10/10/2013 +119 days 🔍
10/10/2013 +0 days 🔍
10/10/2013 +0 days 🔍
10/10/2013 +0 days 🔍
10/15/2013 +5 days 🔍
10/17/2013 +2 days 🔍
12/15/2013 +59 days 🔍
05/26/2021 +2719 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: possible null dereference when parsing vif ratelimiting info
Researcher: Matthew Daley, Coverty Scan
Status: Not defined

CVE: CVE-2013-4369 (🔍)
GCVE (CVE): GCVE-0-2013-4369
GCVE (VulDB): GCVE-100-10666

OVAL: 🔍

X-Force: 87798
SecurityFocus: 62931
OSVDB: 98288
Vulnerability Center: 42575 - Xen 4.2.* and 4.3.* Local Denial of Service via Use of the @ Character as the VIF Rate Configuration, Low

See also: 🔍

Entryinfo

Created: 10/15/2013 10:02
Updated: 05/26/2021 16:06
Changes: 10/15/2013 10:02 (75), 05/17/2017 09:06 (2), 05/26/2021 16:00 (4), 05/26/2021 16:06 (1)
Complete: 🔍
Committer: olku
Cache ID: 216::103

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