CVE-2022-26143

high-risk
Published 2022-03-10

The TP-240 (aka tp240dvr) component in Mitel MiCollab before 9.4 SP1 FP1 and MiVoice Business Express through 8.1 allows remote attackers to obtain sensitive information and cause a denial of service (performance degradation and excessive outbound traffic). This was exploited in the wild in February and March 2022 for the TP240PhoneHome DDoS attack.

Do I need to act?

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89.5% chance of exploitation in next 30 days
EPSS score — higher than 10% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (4)

Affected Vendors

Mitel

References (15)

Exploit https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-ca...
Mitigation https://blog.cloudflare.com/cve-2022-26143/
Issue Tracking https://news.ycombinator.com/item?id=30614073
Broken Link https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered...
Mitigation https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
Vendor Advisory https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-a...
Mitigation https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-ampli...
Exploit https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-ca...
Mitigation https://blog.cloudflare.com/cve-2022-26143/
Issue Tracking https://news.ycombinator.com/item?id=30614073
Broken Link https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered...
Mitigation https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
Vendor Advisory https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-a...
Mitigation https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-ampli...
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-...
69
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 27/34 · High
Exposure 10/34 · Low