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Oracle Linux: (CVE-2021-20230) ELSA-2021-0618: stunnel security update

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Oracle Linux: (CVE-2021-20230) ELSA-2021-0618: stunnel security update

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
02/23/2021
Created
02/26/2021
Added
02/24/2021
Modified
03/08/2021

Description

A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.

Solution(s)

  • oracle-linux-upgrade-stunnel

References

  • ELSA-2021-0618
  • CVE-2021-20230

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