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CVE-2018-0739

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 recu…

Impact

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).

Affected products

VendorProductAffected versions
OpensslOpenssl
from 1.0.2b through 1.0.2n
from 1.1.0 through 1.1.0g
CanonicalUbuntu Linux
Versions 14.04, 16.04, 17.10
DebianDebian Linux
Versions 7.0, 8.0, 9.0

Weakness classification

CWE-674

References