CVE-2020-1968

Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 09 Sept 2020, 13:50
Last modified:16 Apr 2026, 14:10

Vulnerability Summary

Overall Risk (default)
low
17/100
CVSS Score
4.3 MEDIUM
v2.0 (nvd)
EPSS Score
1.04% LOW
1% probability +0.20%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

09 Sept 2020, 13:50
Published
Vulnerability first disclosed
16 Apr 2026, 14:10
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•LOW•Score: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 1.04%• Percentile: 78%

Techniques & Countermeasures

  • CWE-203•Observable Discrepancy

    The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

Affected Systems

  • canonical•ubuntu_linux

    16.04 | 18.04

  • debian•debian_linux

    9.0

  • fujitsu•m10-1_firmware

    < xcp2400 | < xcp3100

  • fujitsu•m10-4_firmware

    < xcp2400 | < xcp3100

  • fujitsu•m10-4s_firmware

    < xcp2400 | < xcp3100

  • fujitsu•m12-1_firmware

    < xcp2400 | < xcp3100

  • fujitsu•m12-2_firmware

    < xcp2400 | < xcp3100

  • fujitsu•m12-2s_firmware

    < xcp2400 | < xcp3100

  • Unknown•OpenSSL

    Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v) | ≥ 1.0.2, ≤ 1.0.2v

  • oracle•ethernet_switch_es1-24_firmware

    1.3.1

  • oracle•ethernet_switch_es2-64_firmware

    2.0.0.14

  • oracle•ethernet_switch_es2-72_firmware

    2.0.0.14

  • oracle•ethernet_switch_tor-72_firmware

    1.2.2

  • oracle•jd_edwards_world_security

    a9.4

  • oracle•peoplesoft_enterprise_peopletools

    8.56 | 8.57 | 8.58

References (10)