Vulnerability in Openssl
CVE-2019-1563
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).
EPSS: 0.038 (89.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Openssl — versions 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)
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openssl-security@openssl.org (mailing-list, x_refsource_BUGTRAQ)
- openssl-security@openssl.org (vendor-advisory, x_refsource_SUSE)
- openssl-security@openssl.org (x_refsource_FEDORA, vendor-advisory)
- openssl-security@openssl.org (vendor-advisory, x_refsource_SUSE)
- openssl-security@openssl.org (mailing-list, x_refsource_MLIST)
- openssl-security@openssl.org (x_refsource_FEDORA, vendor-advisory)
- openssl-security@openssl.org (mailing-list, x_refsource_BUGTRAQ)
- openssl-security@openssl.org (mailing-list, x_refsource_BUGTRAQ)
- openssl-security@openssl.org (vendor-advisory, x_refsource_DEBIAN)
- openssl-security@openssl.org (vendor-advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2019-1563?
- CVE-2019-1563 is a low-severity vulnerability in Openssl, classified under Observable Discrepancy. CVSS score: 3.7/10. Published 2019-09-10.
- How severe is CVE-2019-1563?
- Low severity. CVSS v3 base score is 3.7 out of 10.
- Is CVE-2019-1563 known to be exploited?
- 19 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.