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CVE-2018-0737

MEDIUMCVSS 5.9/10EPSS 11.60%

Last modified

CVE-2018-0737 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. EPSS estimates a 11.60% chance of exploitation in the next 30 days.

Description

The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o).

Metrics

CVSS 3.0
5.9/10

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability
11.60%

96.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
OpensslOpenssl>= 1.0.2b, <= 1.0.2o
OpensslOpenssl>= 1.1.0, <= 1.1.0h
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux17.10

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-0737?
The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o).
How severe is CVE-2018-0737?
CVE-2018-0737 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 11.60% probability of exploitation in the next 30 days.
How do I fix CVE-2018-0737?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST