Buffer overflow in Ntop Ndpi
CVE-2020-11939
In nDPI through 3.2 Stable, the SSH protocol dissector has multiple KEXINIT integer overflows that result in a controlled remote heap overflow in concat_hash_string in ssh.c. Due to the granular nature of the overflow primitive and the ability to control both the contents and layout of the nDPI library's heap memory through remote input, this vulnerability may be abused to achieve full Remote Code Execution against any network inspection stack that is linked against nDPI and uses it to perform network traffic analysis.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.033 (88.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/ntop/nDPI/commit/7ce478a58b4dd29a8d1e6f4e9df2f778613d9202 (Patch, Third Party Advisory)
- securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-11939?
- CVE-2020-11939 is a critical-severity vulnerability in Ntop Ndpi, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2020-04-23.
- How severe is CVE-2020-11939?
- Critical severity. CVSS v3 base score is 9.8 out of 10.