What is CVE-2016-6489?

CVE-2016-6489 is a high-severity software vulnerability (CWE-203) with a CVSS score of 7.5. The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack.

Is CVE-2016-6489 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 5%.

What products does CVE-2016-6489 affect?

Tracked products affected include Ubuntu. Check the version you run to see whether it is affected.

How do I fix CVE-2016-6489?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2016-6489

HIGH severity · CVSS 7.5 · CWE-203

7.5CVSS HIGH

Summary

The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactNone

Availability impactNone

Exploit probability (EPSS)5%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products we track (1)

Ubuntu

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: http://www.openwall.com/lists/oss-security/2016/07/29/7 ↗

Additional information

NVD record
http://www.openwall.com/lists/oss-security/2016/07/29/7Patch
https://git.lysator.liu.se/nettle/nettle/commit/3fe1d6549765ecfb24f0b80b2ed086fdc818bff3Patch
http://rhn.redhat.com/errata/RHSA-2016-2582.htmlAdvisory
http://www.ubuntu.com/usn/USN-3193-1Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1362016Advisory
https://eprint.iacr.org/2016/596.pdf
https://security.gentoo.org/glsa/201706-21Advisory
https://www.oracle.com/security-alerts/cpuapr2020.htmlAdvisory