OpenSSL up to 1.0.2s/1.1.0k/1.1.1d Bleichenbacher missing encryption

Summaryinfo

A vulnerability classified as critical was found in OpenSSL up to 1.0.2s/1.1.0k/1.1.1d. This vulnerability affects unknown code. The manipulation results in missing encryption (Bleichenbacher). This vulnerability is known as CVE-2019-1563. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in OpenSSL up to 1.0.2s/1.1.0k/1.1.1d (Network Encryption Software). It has been classified as critical. Affected is an unknown function. The manipulation with an unknown input leads to a missing encryption vulnerability (Bleichenbacher). CWE is classifying the issue as CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

The weakness was published 09/10/2019 as confirmed git commit (GIT Repository). The advisory is shared for download at git.openssl.org. This vulnerability is traded as CVE-2019-1563 since 11/28/2018. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600.

The vulnerability scanner Nessus provides a plugin with the ID 211827 (Oracle Linux 9 : edk2 (ELSA-2024-12842)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.0.2t, 1.1.0l or 1.1.1d eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.openssl.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (211827). Similar entries are available at VDB-141539 and VDB-141538. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Network Encryption Software

Name

• OpenSSL

Version

• 1.0.2
• 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
• 1.1.0
• 1.1.0a
• 1.1.0b
• 1.1.0c
• 1.1.0d
• 1.1.0e
• 1.1.0f
• 1.1.0g
• 1.1.0h
• 1.1.0i
• 1.1.0j
• 1.1.0k
• 1.1.1
• 1.1.1a
• 1.1.1b
• 1.1.1c
• 1.1.1d

License

• open-source

Website

• Product: https://www.openssl.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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