CVE-2020-36315

Name: CVE-2020-36315
Creator: NVD / NIST
Published: 2021-04-07T21:15:15.87+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2020-36315 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. In RELIC before 2020-08-01, RSA PKCS#1 v1.5 signature forgery can occur because certain checks of the padding (and of the first two bytes) are inadequate. NOTE: this requires that a low public exponent (such as 3) is being used. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

In RELIC before 2020-08-01, RSA PKCS#1 v1.5 signature forgery can occur because certain checks of the padding (and of the first two bytes) are inadequate. NOTE: this requires that a low public exponent (such as 3) is being used. The product, by default, does not generate RSA keys with such a low number.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.93%

55.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-327

Affected Software

Vendor	Product	Versions
Relic Project	Relic	< 2020-08-01

References

https://github.com/relic-toolkit/relic/Third Party Advisory
https://github.com/relic-toolkit/relic/commit/76c9a1fdf19d9e92e566a77376673e522aae9f80Patch, Third Party Advisory
https://github.com/relic-toolkit/relic/issues/154Exploit, Third Party Advisory
https://github.com/relic-toolkit/relic/tree/32eb4c257fc80328061d66639b1cdb35dbed51a2Third Party Advisory
https://github.com/relic-toolkit/relic/Third Party Advisory
https://github.com/relic-toolkit/relic/commit/76c9a1fdf19d9e92e566a77376673e522aae9f80Patch, Third Party Advisory
https://github.com/relic-toolkit/relic/issues/154Exploit, Third Party Advisory
https://github.com/relic-toolkit/relic/tree/32eb4c257fc80328061d66639b1cdb35dbed51a2Third Party Advisory

Timeline

Published: Apr 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-36315?

How severe is CVE-2020-36315?

CVE-2020-36315 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36315?

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.

Are you affected by CVE-2020-36315?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST