CVE-2021-4160

    Dashboard / Vulnerabilities / CVE-2021-4160

    CVE-2021-4160

    Published: 28 Jan 2022Last Modified: 9 Jul 2026

    Summary:

    Details: 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).

    References: https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3bf7b73ea7123045b8f972badc67ed6878e6c37f, https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=6fc1aaaf303185aa5e483e06bdfae16daa9193a7, https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=e9e726506cd2a3fd9c0f12daf8cc1fe934c7dddb, https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf, https://security.gentoo.org/glsa/202210-02, https://security.netapp.com/advisory/ntap-20240621-0006/, https://www.debian.org/security/2022/dsa-5103, https://www.openssl.org/news/secadv/20220128.txt, https://www.oracle.com/security-alerts/cpujul2022.html, https://www.oracle.com/security-alerts/cpuapr2022.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- e818b74be2170fbe957a07b0da4401c2b694b3b8
    Fixed -None

    Affected versions

    3.0.0-NA
    3.0.0-alpha1
    3.0.0-alpha10
    3.0.0-alpha11
    3.0.0-alpha12
    3.0.0-alpha13
    3.0.0-alpha14
    3.0.0-alpha15
    3.0.0-alpha16
    3.0.0-alpha17
    3.0.0-alpha2
    3.0.0-alpha3
    3.0.0-alpha4
    3.0.0-alpha5
    3.0.0-alpha6
    3.0.0-alpha7
    3.0.0-alpha8
    3.0.0-alpha9
    3.0.0-beta1
    3.0.0-beta2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-4160 | CVE-DB