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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6.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco Expressway and TelePresence Video Communication Server. This issue affects some unknown processing of the component Web-based Management Interface/API. Performing a manipulation results in improper neutralization of null byte or nul character. This vulnerability is known as CVE-2022-20813. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco Expressway and TelePresence Video Communication Server (Unified Communication Software) (affected version unknown). This affects an unknown functionality 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. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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 published 07/07/2022 as cisco-sa-expressway-overwrite-3buqW8LH. It is possible to read the advisory at tools.cisco.com. This vulnerability is uniquely identified as CVE-2022-20813 since 11/02/2021. The technical details are unknown and an exploit is not publicly 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: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
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-2022-20813 (🔍)
GCVE (CVE): GCVE-0-2022-20813
GCVE (VulDB): GCVE-100-203295

Entryinfo

Created: 07/07/2022 08:33
Updated: 07/19/2022 14:43
Changes: 07/07/2022 08:33 (49), 07/19/2022 14:43 (18)
Complete: 🔍
Cache ID: 216::103

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