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).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openssl | Openssl | >= 1.0.2b, <= 1.0.2n |
| Canonical | Ubuntu Linux | 14.04 |
| Debian | Debian Linux | 7.0 |
Related Weaknesses (CWE)
References
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.htmlPatchThird Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.securityfocus.com/bid/103518Third Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/105609
- http://www.securitytracker.com/id/1040576Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:3090
- https://access.redhat.com/errata/RHSA-2018:3221
- https://access.redhat.com/errata/RHSA-2018:3505
- https://access.redhat.com/errata/RHSA-2019:0366
- https://access.redhat.com/errata/RHSA-2019:0367
- https://access.redhat.com/errata/RHSA-2019:1711
- https://access.redhat.com/errata/RHSA-2019:1712
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2ac4c6f7b2b2af2
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=9310d45087ae546
FAQ
What is CVE-2018-0739?
CVE-2018-0739 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 S...
How severe is CVE-2018-0739?
CVE-2018-0739 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-0739?
Check the references section above for vendor advisories and patch information. Affected products include: Openssl Openssl, Canonical Ubuntu Linux, Debian Debian Linux.