Description
ION-DTN versions before 4.2.0 contain an out-of-bounds read vulnerability in the decodeSdnv function that allows unauthenticated remote attackers to read memory by sending truncated SDNV values. Attackers can send a UDP datagram to the LTP link service input port with a truncated SDNV to trigger reads up to nine bytes past buffer boundaries and underflow byte counters.
References8
- github.com/nasa-jpl/ION-DTN
- github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/libr…
- github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/libr…
- github.com/nasa-jpl/ION-DTN/commit/d52d22bdd383798712357f86a277…
- github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.0
- github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-…
- www.vulncheck.com/advisories/ion-dtn-before-4.2.0-out-of-bounds…
- github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 4.0
-
8.7
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 59 · as of 8 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.