OpenSSL up to 1.0.2v TLS TLS Connection inadequate encryption

Summaryinfo

A vulnerability marked as critical has been reported in OpenSSL up to 1.0.2v. This impacts an unknown function of the component TLS Handler. Performing a manipulation as part of TLS Connection results in inadequate encryption. This vulnerability was named CVE-2020-1968. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in OpenSSL up to 1.0.2v (Network Encryption Software). This affects an unknown code of the component TLS Handler. The manipulation as part of a TLS Connection leads to a inadequate encryption vulnerability. CWE is classifying the issue as CWE-326. The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required. This is going to have an impact on confidentiality. The summary by CVE is:

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).

The weakness was presented 09/09/2020 (Website). It is possible to read the advisory at openssl.org. This vulnerability is uniquely identified as CVE-2020-1968 since 12/03/2019. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

Upgrading to version 1.0.2w or 1.1.1 eliminates this vulnerability.

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Productinfo

Type

• Network Encryption Software

Name

• OpenSSL

Version

• 1.0.2a
• 1.0.2b
• 1.0.2c
• 1.0.2d
• 1.0.2e
• 1.0.2f
• 1.0.2g
• 1.0.2h
• 1.0.2i
• 1.0.2j
• 1.0.2k
• 1.0.2l
• 1.0.2m
• 1.0.2n
• 1.0.2o
• 1.0.2p
• 1.0.2q
• 1.0.2r
• 1.0.2s
• 1.0.2t
• 1.0.2u
• 1.0.2v

License

• open-source

Support

• end of life (old version)

Website

• Product: https://www.openssl.org/

CPE 2.3info

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CPE 2.2info

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