Linux Foundation Xen 4.4.0/4.4.1 on 64-bit ARM System Register memory corruption

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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Foundation Xen 4.4.0/4.4.1 on 64-bit ARM. This vulnerability affects unknown code of the component System Register Handler. Executing a manipulation can lead to memory corruption. This vulnerability is tracked as CVE-2014-5148. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as problematic was found in Linux Foundation Xen 4.4.0/4.4.1 on 64-bit ARM (Virtualization Software). This vulnerability affects an unknown function of the component System Register Handler. The manipulation with an unknown input 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 availability.

The weakness was disclosed 08/12/2014 by Riku Voipio as XSA-103 as confirmed advisory (Website). The advisory is shared for download at xenbits.xenproject.org. This vulnerability was named CVE-2014-5148 since 07/30/2014. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The advisory points out:

When handling an unknown system register access from 64-bit userspace Xen would incorrectly return to the second instruction of the trap handler for faults in kernel space rather than the first instruction of the trap handler for faults in 64-bit userspace. Any user in a guest which is running a 64-bit kernel who is able to spawn a 64-bit process can cause a trap to the kernel to be taken at an unexpected (but not user controlled) exception address. Known versions of Linux in the default configuration will Oops and kill the offending process, and therefore avoid this vulnerability. However local configuration may turn such an Oops into a kernel panic, and therefore a guest denial of service.

Applying the patch xsa103-4.4.patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xenproject.org.

The vulnerability is also documented in the databases at X-Force (95233), SecurityFocus (BID 69187†), Secunia (SA59934†), SecurityTracker (ID 1030725†) and Vulnerability Center (SBV-46775†). The entries VDB-67314, VDB-67313 and VDB-67311 are pretty similar. 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: 6.2
VulDB Meta Temp Score: 5.4

VulDB Base Score: 6.2
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: xsa103-4.4.patch

Timelineinfo

07/30/2014 🔍
08/12/2014 +13 days 🔍
08/12/2014 +0 days 🔍
08/12/2014 +0 days 🔍
08/13/2014 +1 days 🔍
08/13/2014 +0 days 🔍
08/13/2014 +0 days 🔍
10/26/2014 +74 days 🔍
10/27/2014 +1 days 🔍
02/10/2022 +2663 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-103
Researcher: Riku Voipio
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-5148 (🔍)
GCVE (CVE): GCVE-0-2014-5148
GCVE (VulDB): GCVE-100-67312
X-Force: 95233 - Xen system register denial of service, Medium Risk
SecurityFocus: 69187
Secunia: 59934 - Xen Unknown System Register Handling Vulnerability, Less Critical
SecurityTracker: 1030725 - Xen Lets Local Users on a Guest System Deny Service or Gain Elevated Privileges on the Guest System
Vulnerability Center: 46775 - Xen 4.4.x Local DoS and Privilege Escalation via a Crafted Process, Medium

See also: 🔍

Entryinfo

Created: 08/13/2014 10:41
Updated: 02/10/2022 10:00
Changes: 08/13/2014 10:41 (74), 06/10/2017 09:28 (3), 02/10/2022 10:00 (3)
Complete: 🔍
Cache ID: 216::103

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