CVE-2021-4160
Published: 28 January 2022
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).
Notes
Author | Note |
---|---|
mdeslaur | Ubuntu does not produce MIPS binaries or support MIPS. |
Priority
Status
Package | Release | Status |
---|---|---|
edk2 Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
|
upstream |
Needs triage
|
|
bionic |
Not vulnerable
|
|
focal |
Not vulnerable
|
|
impish |
Not vulnerable
|
|
trusty |
Does not exist
|
|
kinetic |
Not vulnerable
|
|
lunar |
Not vulnerable
|
|
xenial |
Needed
|
|
mantic |
Not vulnerable
|
|
nodejs Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(uses system openssl1.0)
|
focal |
Not vulnerable
(uses system openssl1.1)
|
|
impish |
Not vulnerable
(uses system openssl1.1)
|
|
jammy |
Not vulnerable
(uses system openssl1.1)
|
|
trusty |
Not vulnerable
(uses system openssl)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(uses system openssl)
|
|
kinetic |
Not vulnerable
(uses system openssl1.1)
|
|
lunar |
Not vulnerable
(uses system openssl1.1)
|
|
mantic |
Not vulnerable
(uses system openssl1.1)
|
|
openssl Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
impish |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
trusty |
Not vulnerable
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
|
|
kinetic |
Not vulnerable
|
|
lunar |
Not vulnerable
|
|
mantic |
Not vulnerable
|
|
openssl1.0 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.9 |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4160
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=e9e726506cd2a3fd9c0f12daf8cc1fe934c7dddb (OpenSSL_1_1_1m)
- https://mta.openssl.org/pipermail/openssl-announce/2022-January/000214.html
- https://www.openssl.org/news/secadv/20220128.txt
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6fc1aaaf303185aa5e483e06bdfae16daa9193a7
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=3bf7b73ea7123045b8f972badc67ed6878e6c37f
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=e9e726506cd2a3fd9c0f12daf8cc1fe934c7dddb
- NVD
- Launchpad
- Debian