Vulnerability in Openssl
CVE-2019-1549
OpenSSL 1.1.1 introduced a rewritten random number generator (RNG). This was intended to include protection in the event of a fork() system call in order to ensure that the parent and child processes did not share the same RNG state. However this protection was not being used in the default case. A partial mitigation for this issue is that the output from a high precision timer is mixed into the RNG state so the likelihood of a parent and child process sharing state is significantly reduced. If an application already calls OPENSSL_init_crypto() explicitly using OPENSSL_INIT_ATFORK then this problem does not occur at all. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c).
EPSS: 0.062 (92.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/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)
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openssl-security@openssl.org (x_refsource_FEDORA, vendor-advisory)
- openssl-security@openssl.org (x_refsource_FEDORA, vendor-advisory)
- openssl-security@openssl.org (mailing-list, x_refsource_BUGTRAQ)
- openssl-security@openssl.org (vendor-advisory, x_refsource_DEBIAN)
- openssl-security@openssl.org (x_refsource_UBUNTU, vendor-advisory)
- openssl-security@openssl.org (x_refsource_MISC)
- openssl-security@openssl.org (x_refsource_MISC)
- openssl-security@openssl.org (x_refsource_MISC)
- openssl-security@openssl.org (x_refsource_MISC)
- openssl-security@openssl.org (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-1549?
- CVE-2019-1549 is a medium-severity vulnerability in Openssl, classified under Use of Insufficiently Random Values. CVSS score: 5.3/10. Published 2019-09-10.
- How severe is CVE-2019-1549?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2019-1549 known to be exploited?
- 18 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.