CVE-2020-23911

MEDIUMNVD 5.55.5—Elevated

5.5

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.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 14.1%
KEV: Not listed

Published

July 18, 2023

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://github.com/vlm/asn1c/issues/394
af854a3a-2127-422b-91ae-364da2661108https://github.com/vlm/asn1c/issues/394

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-476NULL Pointer Dereference

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
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2026-05-31 00:15 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 21:02 UTCEG score recompute
2026-05-24 21:02 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2020-23911?

CVE-2020-23911 is a medium vulnerability published on July 18, 2023. An issue was discovered in asn1c through v0.9.28. A NULL pointer dereference exists in the function defaulterror_logger() located in asn1fix.c. It allows an attacker to cause Denial of Service.

When was CVE-2020-23911 disclosed?

CVE-2020-23911 was first published in the National Vulnerability Database on July 18, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-23911 actively exploited?

CVE-2020-23911 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-23911?

CVE-2020-23911 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2020-23911?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-23911, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2020-23911

📅 Published

🔄 Last Modified

🔗 References (2)