Vulnerability · Published Jul 18, 2023 · Assigned by mitre
CVE-2020-23911
Medium 5.5
In plain English
A medium-severity security flaw in the asn1c package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 77.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | asn1c | no fix listed | DEBIAN-CVE-2020-23911 |
| Debian:13 | asn1c | no fix listed | DEBIAN-CVE-2020-23911 |
| Debian:14 | asn1c | no fix listed | DEBIAN-CVE-2020-23911 |
| Ubuntu:22.04:LTS | asn1c | no fix listed | UBUNTU-CVE-2020-23911 |
| Ubuntu:24.04:LTS | asn1c | no fix listed | UBUNTU-CVE-2020-23911 |
| Ubuntu:25.10 | asn1c | no fix listed | UBUNTU-CVE-2020-23911 |
| Ubuntu:26.04:LTS | asn1c | no fix listed | UBUNTU-CVE-2020-23911 |
| Ubuntu:26.10 | asn1c | no fix listed | UBUNTU-CVE-2020-23911 |