CVE-2021-20305 Other in nettle
Attackers can cause denial of service or bypass signature validation in Nettle by exploiting out-of-range scalars in ECC operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-20305?
CVE-2021-20305 is a high-severity vulnerability in Debian Debian Linux, published on 5 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.
Which versions are affected by CVE-2021-20305?
It affects 6 products.
Linux distribution packages (40)
nettle Red Hat:enterprise_linux:7::client | All versions | 0:2.7.1-9.el7_9 |
nettle-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:2.7.1-9.el7_9 |
nettle-devel Red Hat:enterprise_linux:7::client | All versions | 0:2.7.1-9.el7_9 |
nettle-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.1-9.el7_9 |
nettle-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.1-9.el7_9 |
nettle Red Hat:enterprise_linux:7::server | All versions | 0:2.7.1-9.el7_9 |
nettle-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:2.7.1-9.el7_9 |
nettle-devel Red Hat:enterprise_linux:7::server | All versions | 0:2.7.1-9.el7_9 |
nettle Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.1-9.el7_9 |
nettle-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.1-9.el7_9 |
nettle-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.1-9.el7_9 |
gnutls-c++ Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
gnutls-c++-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
gnutls-dane Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
gnutls-dane-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
gnutls-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
gnutls-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
gnutls-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
gnutls-utils Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
gnutls-utils-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.14-8.el8_3 |
nettle-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.4.1-4.el8_3 |
nettle-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:3.4.1-4.el8_3 |
nettle-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:3.4.1-4.el8_3 |
gnutls Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.14-8.el8_3 |
gnutls-c++-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.14-8.el8_3 |
gnutls-dane-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.14-8.el8_3 |
gnutls-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.14-8.el8_3 |
gnutls-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.14-8.el8_3 |
gnutls-utils-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.14-8.el8_3 |
nettle Red Hat:enterprise_linux:8::baseos | All versions | 0:3.4.1-4.el8_3 |
nettle-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.4.1-4.el8_3 |
nettle-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:3.4.1-4.el8_3 |
nettle Red Hat:rhel_aus:7.3::server | All versions | 0:2.7.1-9.el7_3 |
nettle-debuginfo Red Hat:rhel_aus:7.3::server | All versions | 0:2.7.1-9.el7_3 |
nettle-devel Red Hat:rhel_aus:7.3::server | All versions | 0:2.7.1-9.el7_3 |
nettle Red Hat:rhel_aus:7.4::server | All versions | 0:2.7.1-9.el7_4 |
nettle-debuginfo Red Hat:rhel_aus:7.4::server | All versions | 0:2.7.1-9.el7_4 |
nettle-devel Red Hat:rhel_aus:7.4::server | All versions | 0:2.7.1-9.el7_4 |
nettle Red Hat:rhel_aus:7.6::server | All versions | 0:2.7.1-9.el7_6 |
nettle-debuginfo Red Hat:rhel_aus:7.6::server | All versions | 0:2.7.1-9.el7_6 |
Products include Debian Debian Linux, Fedoraproject Fedora, Netapp Active Iq Unified Manager, Netapp Ontap Select Deploy Administration Utility, Nettle Project Nettle, Redhat Enterprise Linux.
How do I fix CVE-2021-20305?
Upgrade to a fixed version.
Is CVE-2021-20305 being exploited?
There is no known exploitation of CVE-2021-20305 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2021-20305, DEBIAN-CVE-2021-20305, GHSA-6xrq-2ww3-f6h5, JLSEC-2026-575, OESA-2021-1177, RHSA-2021:1145 and 13 more.