Executive Summary

Name CVE-2021-4160 First vendor Publication 2022-01-28
Vendor Cve Last vendor Modification 2022-11-09

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Overall CVSS Score 5.9
Base Score 5.9 Environmental Score 5.9
impact SubScore 3.6 Temporal Score 5.9
Exploitabality Sub Score 2.2
Attack Vector Network Attack Complexity High
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact None Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:N/A:N)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure. Many EC algorithms are affected, including some of the TLS 1.3 default curves. Impact was not analyzed in detail, because the pre-requisites for attack are considered unlikely and include reusing private keys. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be significant. However, for an attack on TLS to be meaningful, the server would have to share the DH private key among multiple clients, which is no longer an option since CVE-2016-0701. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0.0. It was addressed in the releases of 1.1.1m and 3.0.1 on the 15th of December 2021. For the 1.0.2 release it is addressed in git commit 6fc1aaaf3 that is available to premium support customers only. It will be made available in 1.0.2zc when it is released. The issue only affects OpenSSL on MIPS platforms. Fixed in OpenSSL 3.0.1 (Affected 3.0.0). Fixed in OpenSSL 1.1.1m (Affected 1.1.1-1.1.1l). Fixed in OpenSSL 1.0.2zc-dev (Affected 1.0.2-1.0.2zb).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4160

CPE : Common Platform Enumeration

Application 386
Application 1
Application 2
Application 1
Application 1
Application 2
Application 4
Os 3

Sources (Detail)

Source Url
CONFIRM https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf
DEBIAN https://www.debian.org/security/2022/dsa-5103
GENTOO https://security.gentoo.org/glsa/202210-02
MISC https://www.oracle.com/security-alerts/cpuapr2022.html
N/A https://www.oracle.com/security-alerts/cpujul2022.html

Alert History

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Date Informations
2022-11-15 01:59:47
  • Multiple Updates
2022-11-10 00:27:33
  • Multiple Updates
2022-10-16 21:27:19
  • Multiple Updates
2022-10-11 05:27:34
  • Multiple Updates
2022-10-11 01:23:33
  • Multiple Updates
2022-10-06 09:27:31
  • Multiple Updates
2022-09-13 17:27:19
  • Multiple Updates
2022-07-26 00:29:39
  • Multiple Updates
2022-04-20 09:23:08
  • Multiple Updates
2022-03-24 21:23:13
  • Multiple Updates
2022-03-16 13:23:03
  • Multiple Updates
2022-02-07 21:22:58
  • Multiple Updates
2022-01-29 09:22:53
  • Multiple Updates
2022-01-29 00:22:51
  • First insertion