Traffic disclosure and alteration via crafted certificates
Published Jul 6, 2022 · Updated Nov 6, 2024
Improper certificate validation in Cisco TelePresence VCS Expressway allows man-in-the-middle attackers to read or alter traffic. The certificate-validation path accepts a crafted certificate as the endpoint identity, letting an interceptor impersonate that endpoint. Exploitation requires a network position between communicating devices; successful interception exposes traffic in clear text and permits its contents to be modified.
Summary
What happened
Improper certificate validation in Cisco TelePresence VCS Expressway allows man-in-the-middle attackers to read or alter traffic. The certificate-validation path accepts a crafted certificate as the endpoint identity, letting an interceptor impersonate that endpoint. Exploitation requires a network position between communicating devices; successful interception exposes traffic in clear text and permits its contents to be modified.
The record
- CVE
- CVE-2022-20813
- Published
- Jul 6, 2022
- Updated
- Nov 6, 2024
- Vendor
- ClamAV
- Product
- Cisco TelePresence Video Communication Server (VCS) Expressway
- Classifications
- CWE-295, CWE-158, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 6, 2022CVE publishedPublication date reported by the CVE source.
- Nov 6, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=n/a
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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