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TI-2023-20813 Aliases CVE-2023-39914GHSA-6jmw-6mxw-w4jc

BER/CER/DER decoder panics on invalid input

Priority MEDIUM 40CWE-232Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00702 53rd percentileScored 2026-11-07
Fix Fixed bcder (NLnet Labs): 0.7.3bcder (crates.io): 0.7.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NLnet Labsbcderbefore 0.7.30.7.3Patch availableCNA
—bcder (crates.io)before 0.7.30.7.3Patch availableGHSA-6jmw-6mxw-w4jc
  • bcder VendorNLnet Labs Affected before 0.7.3 Fixed in 0.7.3 Patch available CNA
  • bcder (crates.io) Vendor— Affected before 0.7.3 Fixed in 0.7.3 Patch available GHSA-6jmw-6mxw-w4jc

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nlnetlabs:bcder:*:*:*:*:*:*:*:*before 0.7.3VulnerableNLNETLABS
  • cpe:2.3:a:nlnetlabs:bcder:*:*:*:*:*:*:*:* Versions before 0.7.3 Vulnerable ·NLNETLABS

Remediation

  • Fix · CNA bcder (NLnet Labs) Fixed in 0.7.3
  • Fix · GHSA-6jmw-6mxw-w4jc bcder (crates.io) Fixed in 0.7.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-39914
  2. 2026-10-03 Alias added: GHSA-6jmw-6mxw-w4jc

References

Advisory 2

Other 3

  • TI-2026-25690 Possible arbitrary code execution during DNSSEC validation CVSS 4.0CRITICAL 9.1
  • TI-2026-56302 Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY CVSS 4.0CRITICAL 9.1
  • TI-2026-31146 Crash during DNSSEC validation of malicious content CVSS 4.0HIGH 8.7
  • TI-2026-31135 Heap overflow with multiple NSID, COOKIE, PADDING EDNS options CVSS 4.0HIGH 8.7
  • TI-2026-36436 Routinator crashes on specifically crafted RRDP XML files CVSS 4.0HIGH 8.7
  • TI-2026-36433 Routinator exits when accepting an incoming HTTP or RTR connection fails CVSS 4.0HIGH 8.7
See all 96 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences