CVE-2020-14967: kjur jsrsasign

Vulnerability summary

CVE-2020-14967 is a critical (CVSS 9.8) vulnerability in kjur jsrsasign. EPSS estimates a 2.27% chance of exploitation in the next 30 days, higher than 82.7% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 22-06-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

An issue was discovered in the jsrsasign package before 8.0.18 for Node.js. Its RSA PKCS1 v1.5 decryption implementation does not detect ciphertext modification by prepending '\0' bytes to ciphertexts (it decrypts modified ciphertexts without error). An attacker might prepend these bytes with the goal of triggering memory corruption issues.

• 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.