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OpenSSL Constructed ASN.1 types with a recursive definition could exceed the stack (CVE-2018-0739)

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OpenSSL Constructed ASN.1 types with a recursive definition could exceed the stack (CVE-2018-0739)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:P)
Published
03/27/2018
Created
07/25/2018
Added
03/28/2018
Modified
07/11/2019

Description

Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).

Solution(s)

  • http-openssl-1_0_2-upgrade-1_0_2_o
  • http-openssl-1_1_0-upgrade-1_1_0_h

References

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