Background exploitation KEV catalog
CVE-2020-11899
Treck TCP/IP stack Out-of-Bounds Read Vulnerability
The Treck TCP/IP stack before 6.0.1.66 has an IPv6 Out-of-bounds Read.
CheckOps priority index
4.5/10 Patch within 7 days
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
EPSS · today 18.4% higher than 97.2% of CVEs
CVSS 3.1 5.4 AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:
Exploited for 1,708 days 03 Mar 2022
CISA due date 17 Mar 2022 for US federal agencies
Exploitation probability EPSS · FIRST
EPSS probability (%)Percentile among all CVEs
Exploitation signals 3 / 5
- KEV catalog (CISA)03 Mar 2022
- Exploited in EUVD (ENISA)03 Mar 2022
- Used by ransomwareno
- EPSS above 10 %18.4%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply updates per vendor instructions.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Affected products
IPv6
Weaknesses (CWE) Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
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EPSS peak: 18.6%