CVE-2018-0739 - CVE House
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Status published Medium CVE-2018-0739

Constructed ASN.1 types with a recursive definition could exceed the stack

Vulnerability 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).

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • OSS-fuzz

References

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Affected Vendor

Affected Software

OpenSSL
Vulnerable Versions:
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)

Timeline

Official Publish: March 27th, 2018
Last Modified: September 16th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.