CVE-2019-20391: cesnet libyang

Vulnerability summary

CVE-2019-20391 is a medium (CVSS 6.5) vulnerability in cesnet libyang. EPSS estimates a 1.88% chance of exploitation in the next 30 days, higher than 79% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 22-01-2020
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

An invalid memory access flaw is present in libyang before v1.0-r3 in the function resolve_feature_value() when an if-feature statement is used inside a bit. Applications that use libyang to parse untrusted input yang files may crash.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.