CVE-2018-0739
Medium
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).
SeverityMedium
CVSS6.5
Exploit probability—
Product
Openssl
PublishedMar 27, 2018
First seenMar 27, 2018
How to fix
Vendor advisories
- usn.ubuntu.com/3611-2/
- debian.org/security/2018/dsa-4158
- security.gentoo.org/glsa/201811-21
- access.redhat.com/errata/RHSA-2019:0367
- debian.org/security/2018/dsa-4157
- access.redhat.com/errata/RHSA-2018:3505
- access.redhat.com/errata/RHSA-2018:3221
- usn.ubuntu.com/3611-1/
- access.redhat.com/errata/RHSA-2019:0366
- access.redhat.com/errata/RHSA-2018:3090
- access.redhat.com/errata/RHSA-2019:1711
- access.redhat.com/errata/RHSA-2019:1712
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openssl openssl | 1.0.2b ≤ v ≤ 1.0.2n, 1.1.0 ≤ v ≤ 1.1.0g | — |
| canonical ubuntu_linux | 14.04, 16.04, 17.10 | — |
| debian debian_linux | 7.0, 8.0, 9.0 | — |
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