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Vulnerability · Published Sep 9, 2020 · Assigned by openssl

CVE-2020-1968Raccoon attack

Low 3.7

In plain English

A low-severity security flaw in OpenSSL from OpenSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.9% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)4.9%top 7.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites. This issue affects OpenSSL 1.0.2 which is out of support and no longer receiving public updates. OpenSSL 1.1.1 is not vulnerable to this issue. Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12openssl1.1.0c-1DEBIAN-CVE-2020-1968
Debian:13openssl1.1.0c-1DEBIAN-CVE-2020-1968
Debian:14openssl1.1.0c-1DEBIAN-CVE-2020-1968

Affected products (as reported)

VendorProductVersions
OpenSSL OpenSSL Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v)

Weakness: CWE-203 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References