Cisco Expressway/TelePresence Video Communication Server Web-based Management Interface/API null byte or nul character

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Cisco Expressway and TelePresence Video Communication Server. This vulnerability affects unknown code of the component Web-based Management Interface/API. Such manipulation leads to improper neutralization of null byte or nul character. This vulnerability is traded as CVE-2022-20812. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cisco Expressway and TelePresence Video Communication Server (Unified Communication Software) (version unknown). Affected by this issue is an unknown function of the component Web-based Management Interface/API. The manipulation with an unknown input leads to a improper neutralization of null byte or nul character vulnerability. Using CWE to declare the problem leads to CWE-158. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes NUL characters or null bytes when they are sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.

The weakness was shared 07/07/2022 as cisco-sa-expressway-overwrite-3buqW8LH. The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2022-20812 since 11/02/2021. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.2
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 9.0
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Improper neutralization of null byte or nul character
CWE: CWE-158 / CWE-20
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: 🔍

Timelineinfo

11/02/2021 🔍
07/07/2022 +246 days 🔍
07/07/2022 +0 days 🔍
07/19/2022 +12 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-expressway-overwrite-3buqW8LH
Status: Confirmed

CVE: CVE-2022-20812 (🔍)
GCVE (CVE): GCVE-0-2022-20812
GCVE (VulDB): GCVE-100-203294

Entryinfo

Created: 07/07/2022 08:33
Updated: 07/19/2022 14:39
Changes: 07/07/2022 08:33 (49), 07/19/2022 14:39 (18)
Complete: 🔍
Cache ID: 216::103

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