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Fencer Vulns
high 7.5

CVE-2023-39914 json

BER/CER/DER decoder panics on invalid input

published 2023-09-13 3 y ago modified 2026-06-17 4 mo ago also GHSA-6jmw-6mxw-w4jc , RUSTSEC-2023-0062 , EUVD-2023-2446

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

NLnet Labs' bcder library up to and including version 0.7.2 panics while decoding certain invalid input data rather than rejecting the data with an error. This can affect both the actual decoding stage as well as accessing content of types that utilized delayed decoding.

Patch / fix

  • crates.io bcder 0.7.3
  • NLnet Labs bcder 0.7.3
  • rust-bcder Debian 13 0.7.3-1

debian advisories DEBIAN-CVE-2023-39914

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
crates.io bcder
<0.7.3
>=0.0.0-0, <0.7.3
0.7.3

Affected products

  • NLnet Labs bcder

Classification

Weakness
  • CWE-232 Improper Handling of Undefined Values
  • CWE-240 Improper Handling of Inconsistent Structural Elements
  • CWE-228 Improper Handling of Syntactically Invalid Structure

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.