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CVE-2020-1968

LOWCVSS 3.7/10EPSS 4.80%

Last modified

CVE-2020-1968 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. 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. EPSS estimates a 4.80% chance of exploitation in the next 30 days.

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).

Metrics

CVSS 3.1
3.7/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability
4.80%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
OpensslOpenssl>= 1.0.2, <= 1.0.2v
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux18.04
DebianDebian Linux9.0
OracleJd Edwards World Securitya9.4
OraclePeoplesoft Enterprise Peopletools8.56
OraclePeoplesoft Enterprise Peopletools8.57
OraclePeoplesoft Enterprise Peopletools8.58
OracleEthernet Switch Es2-64 Firmware2.0.0.14
OracleEthernet Switch Es2-72 Firmware2.0.0.14
FujitsuM10-1 Firmware< xcp2400
FujitsuM10-4 Firmware< xcp2400
FujitsuM10-4s Firmware< xcp2400
FujitsuM12-1 Firmware< xcp2400
FujitsuM12-2 Firmware< xcp2400
FujitsuM12-2s Firmware< xcp2400
FujitsuM10-1 Firmware< xcp3100
FujitsuM10-4 Firmware< xcp3100
FujitsuM10-4s Firmware< xcp3100
FujitsuM12-1 Firmware< xcp3100
FujitsuM12-2 Firmware< xcp3100
FujitsuM12-2s Firmware< xcp3100
OracleEthernet Switch Es1-24 Firmware1.3.1
OracleEthernet Switch Tor-72 Firmware1.2.2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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. 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).
How severe is CVE-2020-1968?
CVE-2020-1968 has a CVSS score of 3.7/10 (LOW severity). The EPSS model estimates a 4.80% probability of exploitation in the next 30 days.
How do I fix CVE-2020-1968?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-1968?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST