VDB-224522 · CVE-2022-36971 · ZDI-22-776

Ivanti Avalanche 6.3.2.3490 JwtTokenUtility deserialization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Ivanti Avalanche 6.3.2.3490 and classified as very critical. Affected by this issue is the function JwtTokenUtility. Such manipulation leads to deserialization. This vulnerability is uniquely identified as CVE-2022-36971. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Ivanti Avalanche 6.3.2.3490. It has been rated as very critical. Affected by this issue is the function JwtTokenUtility. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. CVE summarizes:

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ivanti Avalanche 6.3.2.3490. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the JwtTokenUtility class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-15301.

The weakness was disclosed 03/30/2023 as ZDI-22-776. The advisory is available at zerodayinitiative.com. This vulnerability is handled as CVE-2022-36971 since 07/27/2022. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/20/2023).

Upgrading to version 6.3.4 eliminates this vulnerability. The upgrade is hosted for download at download.wavelink.com.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Endpoint Management Software

Vendor

Ivanti

Name

Avalanche

Version

6.3.2.3490

License

commercial

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 9.0

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 9.8
CNA Vector (Zero Day Initiative): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Avalanche 6.3.4

Timelineinfo

07/27/2022 🔍
03/30/2023 +246 days 🔍
03/30/2023 +0 days 🔍
04/20/2023 +21 days 🔍

Sourcesinfo

Advisory: ZDI-22-776
Status: Confirmed

CVE: CVE-2022-36971 (🔍)
GCVE (CVE): GCVE-0-2022-36971
GCVE (VulDB): GCVE-100-224522

Entryinfo

Created: 03/30/2023 10:30
Updated: 04/20/2023 09:16
Changes: 03/30/2023 10:30 (32), 03/30/2023 10:31 (19), 04/20/2023 09:16 (11)
Complete: 🔍
Cache ID: 216::103