An issue was discovered in asn1c through v0.9.28.
Priority MEDIUM 58CWE-476Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.
Summary
An issue was discovered in asn1c through v0.9.28. A NULL pointer dereference exists in the function _default_error_logger() located in asn1fix.c. It allows an attacker to cause Denial of Service.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00296 22nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:asn1c_project:asn1c:*:*:*:*:*:*:*:* | up to 0.9.28 | Vulnerable | Asn1c Project |
- cpe:2.3:a:asn1c_project:asn1c:*:*:*:*:*:*:*:* Versions up to 0.9.28 Vulnerable ·Asn1c Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-23911
- 2026-10-03 Alias added: GHSA-g4q7-qpw3-v546
References
More Asn1c Project Asn1c vulnerabilities
- TI-2020-14726 Stack-based buffer overflow vulnerability in asn1c through v0.9.28 via function genhash_get in genhash.c. CVSS 3.1MEDIUM 5.5
- TI-2017-09611 The asn1f_lookup_symbol_impl function in asn1fix_retrieve.c in libasn1fix.a in asn1c… CVSS 3.0MEDIUM 6.5
Sources
- CVE-2020-23911 · CVE Program
- CVE-2020-23911 · NVD
- FIRST EPSS
- GHSA-g4q7-qpw3-v546 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences