CVE-2021-3449

Published: 25 March 2021

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

Priority

High

CVSS 3 base score: 5.9

Status

Package Release Status
edk2
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

Ubuntu 20.10 (Groovy Gorilla) Not vulnerable

Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable

Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

nodejs
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
(uses system openssl1.1)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(uses system openssl1.1)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(uses system openssl1.0)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(uses system openssl)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(uses system openssl)
openssl
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.10 (Groovy Gorilla)
Released (1.1.1f-1ubuntu4.3)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1.1.1f-1ubuntu2.3)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1.1.1-1ubuntu2.1~18.04.9)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(1.0.2g-1ubuntu4.19)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable

openssl1.0
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.10 (Groovy Gorilla) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(1.0.2n-1ubuntu5.6)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist