cve/2018/CVE-2018-0739.md

CVE-2018-0739

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).

POC

Reference

• http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
• http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
• http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
• http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
• https://www.oracle.com//security-alerts/cpujul2021.html
• https://www.oracle.com//security-alerts/cpujul2021.html
• https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
• https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
• https://www.tenable.com/security/tns-2018-04
• https://www.tenable.com/security/tns-2018-04
• https://www.tenable.com/security/tns-2018-06
• https://www.tenable.com/security/tns-2018-06
• https://www.tenable.com/security/tns-2018-07
• https://www.tenable.com/security/tns-2018-07

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/chnzzh/OpenSSL-CVE-lib
• https://github.com/tlsresearch/TSI