- 3.7LowCVSS base score
- 4.9%Exploitation in 30 daysEPSS · top 7.8% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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).
Timeline
ID reserved
By openssl
- 9 months later
· 9 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Low3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVDNVD · Modified | 3.1 | Low3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 4.9% · top 7.8% of all CVEs (10 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.
Affected products
References
10
- https://www.openssl.org/news/secadv/20200909.txt (opens in a new tab)x_transferred
- USN-4504-1 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20200925 [SECURITY] [DLA 2378-1] openssl1.0 security update (opens in a new tab)mailing-listx_transferred
- https://www.oracle.com/security-alerts/cpujan2021.html (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20200911-0004/ (opens in a new tab)x_transferred
- https://www.oracle.com/security-alerts/cpuApr2021.html (opens in a new tab)x_transferred
- https://www.oracle.com//security-alerts/cpujul2021.html (opens in a new tab)x_transferred
- https://www.oracle.com/security-alerts/cpuoct2021.html (opens in a new tab)x_transferred
- https://www.oracle.com/security-alerts/cpuapr2022.html (opens in a new tab)x_transferred
- GLSA-202210-02 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-12758 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-1968)Record last updated .