Xen p2m Mapping memory allocation

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Xen. It has been declared as problematic. Affected is an unknown function of the component p2m Mapping Handler. Such manipulation leads to memory allocation. This vulnerability is referenced as CVE-2022-33747. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Xen (Virtualization Software) (version now known). Affected by this issue is some unknown processing of the component p2m Mapping Handler. The manipulation with an unknown input leads to a memory allocation vulnerability. Using CWE to declare the problem leads to CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. Impacted is availability. CVE summarizes:

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

The weakness was published 10/11/2022. The advisory is shared for download at xenbits.xenproject.org. This vulnerability is handled as CVE-2022-33747 since 06/15/2022. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 211008 (Fedora 37 : xen (2022-d80cc73088)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (211008). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 211008
Nessus Name: Fedora 37 : xen (2022-d80cc73088)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/15/2022 🔍
10/11/2022 +118 days 🔍
10/11/2022 +0 days 🔍
11/17/2024 +768 days 🔍

Sourcesinfo

Advisory: FEDORA-2022-5b594b82ac
Status: Confirmed

CVE: CVE-2022-33747 (🔍)
GCVE (CVE): GCVE-0-2022-33747
GCVE (VulDB): GCVE-100-210440

Entryinfo

Created: 10/11/2022 16:29
Updated: 11/17/2024 21:09
Changes: 10/11/2022 16:29 (38), 11/05/2022 09:28 (1), 11/05/2022 09:32 (11), 11/17/2024 21:09 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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