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CVE-2020-11939
CRITICAL
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.
Published: Apr 23, 2020
Modified: Jun 17, 2026
CWE-190
CWE-787
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products (1)
| Vendor | Product | Version |
|---|---|---|
| ntop | ndpi | * |
GitHub Security Advisory GHSA-x59q-66q3-mmf8
In nDPI through 3.2 Stable, the SSH protocol dissector has multiple KEXINIT integer overflows...
References (4)
- https://github.com/ntop/nDPI/commit/7ce478a58b4dd29a8d1e6f4e9df2f778613d9202 Patch, Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi Exploit, Third Party Advisory
- https://github.com/ntop/nDPI/commit/7ce478a58b4dd29a8d1e6f4e9df2f778613d9202 Patch, Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi Exploit, Third Party Advisory
Risk Scores
CVSS Score
9.8 / 10
EPSS Score
3.30%
Top 12% most likely to be exploited
Threat Score
40.2 / 100
Data Sources
NVD
EPSS
GitHub