CVE-2020-1971

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

6.99% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 94.1% of scored records. A rank, not a probability.

NVD base score

5.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-12-08 15:30Z5 YR AGO

Last updated

2026-05-29 15:40Z5 MO AGO

Reserved

2019-12-03

Assigning CNA

openssl

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

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

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

e82dbb6f2d5c069324dcce374c73e5e7d431177168fec7a521664d414e25a0c3

• www.openssl.orghttps://www.openssl.org/news/secadv/20201208.txt
• git.openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f960d81215ebf3f65e03d4d5d857fb9b666d6920
• git.openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2154ab83e14ede338d2ede9bbe5cdfce5d5a6c9e
• www.debian.orgDSA-4807https://www.debian.org/security/2020/dsa-4807vendor-advisory
• security.freebsd.orgFreeBSD-SA-20:33https://security.FreeBSD.org/advisories/FreeBSD-SA-20:33.openssl.ascvendor-advisory
• lists.debian.org[debian-lts-announce] 20201214 [SECURITY] [DLA 2493-1] openssl1.0 security updatehttps://lists.debian.org/debian-lts-announce/2020/12/msg00021.htmlmailing-list
• lists.debian.org[debian-lts-announce] 20201214 [SECURITY] [DLA 2492-1] openssl security updatehttps://lists.debian.org/debian-lts-announce/2020/12/msg00020.htmlmailing-list
• lists.fedoraproject.orgFEDORA-2020-ef1870065ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DGSI34Y5LQ5RYXN4M2I5ZQT65LFVDOUU/vendor-advisory
• lists.apache.org[pulsar-commits] 20201216 [GitHub] [pulsar] phijohns-tibco opened a new issue #8978: OpenSSL needs to be updated to 1.1.1i current version is unsupported.https://lists.apache.org/thread.html/rbb769f771711fb274e0a4acb1b5911c8aab544a6ac5e8c12d40c5143%40%3Ccommits.pulsar.apache.org%3Emailing-list
• lists.fedoraproject.orgFEDORA-2020-a31b01e945https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PWPSSZNZOBJU2YR6Z4TGHXKYW3YP5QG7/vendor-advisory
• security.gentoo.orgGLSA-202012-13https://security.gentoo.org/glsa/202012-13vendor-advisory
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2021.html
• www.tenable.comhttps://www.tenable.com/security/tns-2020-11
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20201218-0005/
• kb.pulsesecure.nethttps://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44676
• lists.apache.org[tomcat-dev] 20210207 [Bug 65126] New: A security vulnerability cve-2020-1971 in Tomcat dependency Library in version 9.0.40.https://lists.apache.org/thread.html/r63c6f2dd363d9b514d0a4bcf624580616a679898cc14c109a49b750c%40%3Cdev.tomcat.apache.org%3Emailing-list
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuApr2021.html
• www.tenable.comhttps://www.tenable.com/security/tns-2021-10
• www.tenable.comhttps://www.tenable.com/security/tns-2021-09
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210513-0002/
• www.oracle.comhttps://www.oracle.com//security-alerts/cpujul2021.html
• www.openwall.com[oss-security] 20210914 Re: Oracle Solaris membership in the distros listhttp://www.openwall.com/lists/oss-security/2021/09/14/2mailing-list
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.html
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20240621-0006/