CVE catalog

CVE-2020-11939

ndpi: CVE-2020-11939

Severity: Medium
Published: Apr 23, 2020, 3:15:14 PM UTC
Source: [NVD] · [CVE record]
EPSS: 3.30% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ndpi	sid	`4.2-2.1`	fixed
Debian	ndpi	forky	`4.2-2.1`	fixed
Debian	ndpi	trixie	`4.2-2.1`	fixed
Debian	ndpi	bookworm	`4.2-2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ndpi	source	sid	`3.4-1`	not yet assigned	Not reported	[972050]
Debian	ndpi	source	forky	`3.4-1`	not yet assigned	Not reported	[972050]
Debian	ndpi	source	trixie	`3.4-1`	not yet assigned	Not reported	[972050]
Debian	ndpi	source	bookworm	`3.4-1`	not yet assigned	Not reported	[972050]

[Debian bug #972050]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libndpi4.2]Fixed
Source package: [ndpi]
Details (2)
- 4.2-2 · amd64 · bookworm
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · bookworm; dsa · ndpi · debian · 12
- 4.2-2 · arm64 · bookworm
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · bookworm; dsa · ndpi · debian · 12
[libndpi-bin]Fixed
Source package: [ndpi]
Details (2)
- 4.2-2 · amd64 · bookworm
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · bookworm; dsa · ndpi · debian · 12
- 4.2-2 · arm64 · bookworm
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · bookworm; dsa · ndpi · debian · 12
[libndpi-dev]Fixed
Source package: [ndpi]
Details (2)
- 4.2-2 · amd64 · bookworm
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · bookworm; dsa · ndpi · debian · 12
- 4.2-2 · arm64 · bookworm
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · bookworm; dsa · ndpi · debian · 12
[libndpi-wireshark]Fixed
Source package: [ndpi]
Details (2)
- 4.2-2 · amd64 · bookworm
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · bookworm; dsa · ndpi · debian · 12
- 4.2-2 · arm64 · bookworm
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · bookworm; dsa · ndpi · debian · 12

[Debian 13 (Trixie)]

[libndpi4.2t64]Fixed
Source package: [ndpi]
Details (2)
- 4.2-2.1+b3 · amd64 · trixie
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · 13
- 4.2-2.1+b3 · arm64 · trixie
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · 13
[libndpi-bin]Fixed
Source package: [ndpi]
Details (2)
- 4.2-2.1+b3 · amd64 · trixie
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · 13
- 4.2-2.1+b3 · arm64 · trixie
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · 13
[libndpi-dev]Fixed
Source package: [ndpi]
Details (2)
- 4.2-2.1+b3 · amd64 · trixie
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · 13
- 4.2-2.1+b3 · arm64 · trixie
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · 13
[libndpi-wireshark]Fixed
Source package: [ndpi]
Details (2)
- 4.2-2.1+b3 · amd64 · trixie
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · 13
- 4.2-2.1+b3 · arm64 · trixie
  Fixed · Fixed: 3.4-1
  dsa · ndpi · debian · 13

Observed: Oct 23, 2026, 5:47:01 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]