CVE-2019-1563 · AETERNAE Research

Disclosure summary

In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

Source-reported weakness categories

CWE-203, CWE-327

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

NIST National Vulnerability Database · NVD-CVE-2019-1563

Open original source · Updated Oct 08, 2026

Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.

Vendor	Product / association	Version / bounds
openssl	openssl	* {"versionStartIncluding":"1.1.1","versionEndIncluding":"1.1.1c"}

Original records & references

PUBLISHED 2019-09-10T13:15:11-04:00
MODIFIED 2026-10-08T18:16:52-04:00
INGESTED 2026-10-10T20:50:18-04:00

CVE-2019-1563.

Disclosure summary

Source-reported weakness categories

Source-specific records & product guidance

Original records & references