Known exploited vulnerability
CVE-2022-26143
The short answer
CVE-2022-26143 affects n/a n/a and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-25: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-306.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Mar 25, 2022
Federal due date Apr 15, 2022
EPSS, next 30 days
87%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
n/a. NVD's record lists the exact affected versions.
References
- arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/ ExploitPress/Media CoverageThird Party Advisory
- blog.cloudflare.com/cve-2022-26143/ MitigationThird Party Advisory
- news.ycombinator.com/item?id=30614073 Issue TrackingThird Party Advisory
- team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/ Broken LinkMitigationThird Party Advisory
- www.akamai.com/blog/security/phone-home-ddos-attack-vector MitigationThird Party Advisory
- www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001 Vendor Advisory
- www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/ MitigationThird Party Advisory
- arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/ ExploitPress/Media CoverageThird Party Advisory
- blog.cloudflare.com/cve-2022-26143/ MitigationThird Party Advisory
- news.ycombinator.com/item?id=30614073 Issue TrackingThird Party Advisory
- team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/ Broken LinkMitigationThird Party Advisory
- www.akamai.com/blog/security/phone-home-ddos-attack-vector MitigationThird Party Advisory
Questions
Is CVE-2022-26143 being exploited?
Yes. CISA added CVE-2022-26143 to its Known Exploited Vulnerabilities catalog on 2022-03-25, with a federal remediation due date of 2022-04-15.
How do I fix CVE-2022-26143?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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