CVE-2016-20013

Public Exploit

Description

sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algorithm's runtime is proportional to the square of the length of the password.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.20%
Third-Party Advisory akkadia.org Third-Party Advisory pthree.org Third-Party Advisory twitter.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://twitter.com/solardiz/status/795601240151457793 third party advisory
https://pthree.org/2018/05/23/do-not-use-sha256crypt-sha512crypt-theyre-dangerous/ third party advisory exploit
https://akkadia.org/drepper/SHA-crypt.txt third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2016-20013?
CVE-2016-20013 has been scored as a high severity vulnerability.
How to fix CVE-2016-20013?
To fix CVE-2016-20013, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-20013 being actively exploited in the wild?
It is possible that CVE-2016-20013 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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