CVE-2020-1968
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.
Does this matter?
Lower severity and a low EPSS score (4.90%). Track it; it rarely justifies an emergency change on its own.
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).
- CVSS 3.1
- 3.7 LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 4.90% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- openssl/openssl · canonical/ubuntu linux · debian/debian linux · oracle/jd edwards world security · oracle/peoplesoft enterprise peopletools · oracle/ethernet switch es2-64 firmware · oracle/ethernet switch es2-72 firmware · fujitsu/m10-1 firmware · fujitsu/m10-4 firmware · fujitsu/m10-4s firmware · fujitsu/m12-1 firmware · fujitsu/m12-2 firmware · fujitsu/m12-2s firmware · oracle/ethernet switch es1-24 firmware · oracle/ethernet switch tor-72 firmware
- Source
- openssl-security@openssl.org
EPSS 4.9% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://lists.debian.org/debian-lts-announce/2020/09/msg00016.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202210-02Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200911-0004/Third Party Advisory
- https://usn.ubuntu.com/4504-1/Third Party Advisory
- https://www.openssl.org/news/secadv/20200909.txtVendor Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00016.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202210-02Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200911-0004/Third Party Advisory
- https://usn.ubuntu.com/4504-1/Third Party Advisory
- https://www.openssl.org/news/secadv/20200909.txtVendor Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.