Proxmox Virtual Environment/Mail Gateway HTTP Request server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k1.80

Summaryinfo

A vulnerability was found in Proxmox Virtual Environment and Mail Gateway and classified as critical. The affected element is an unknown function of the component HTTP Request Handler. Executing a manipulation can lead to server-side request forgery. This vulnerability is tracked as CVE-2022-35508. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Proxmox Virtual Environment and Mail Gateway (the affected version is unknown). It has been declared as critical. This vulnerability affects an unknown code of the component HTTP Request Handler. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Proxmox Virtual Environment (PVE) and Proxmox Mail Gateway (PMG) are vulnerable to SSRF when proxying HTTP requests between pve(pmg)proxy and pve(pmg)daemon. An attacker with an unprivileged account can craft an HTTP request to achieve SSRF and file disclosure of any files on the server. Also, in Proxmox Mail Gateway, privilege escalation to the root@pam account is possible if the backup feature has ever been used, because backup files such as pmg-backup_YYYY_MM_DD_*.tgz have 0644 permissions and contain an authkey value. This is fixed in pve-http-server 4.1-3.

The weakness was disclosed 12/05/2022. The advisory is shared for download at starlabs.sg. This vulnerability was named CVE-2022-35508 since 07/11/2022. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability. Applying the patch 580d540ea907ba15f64379c5bb69ecf1a49a875f is able to eliminate this problem. The bugfix is ready for download at git.proxmox.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2022-38396). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: 580d540ea907ba15f64379c5bb69ecf1a49a875f

Timelineinfo

07/11/2022 🔍
12/05/2022 +147 days 🔍
12/05/2022 +0 days 🔍
06/15/2026 +1288 days 🔍

Sourcesinfo

Advisory: starlabs.sg
Status: Confirmed

CVE: CVE-2022-35508 (🔍)
GCVE (CVE): GCVE-0-2022-35508
GCVE (VulDB): GCVE-100-214792
EUVD: 🔍

Entryinfo

Created: 12/05/2022 08:17
Updated: 06/15/2026 15:43
Changes: 12/05/2022 08:17 (40), 12/26/2022 09:25 (11), 04/25/2025 06:00 (16), 06/15/2026 15:43 (1)
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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