CVE-2018-0739

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

N/A
Published: March 27, 2018 at 09:00 PM UTC
Updated: June 17, 2026 at 01:31 AM UTC
3 products affected across 3 vendorsDebian LinuxUbuntu LinuxOpenSSL

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Severity
N/A
Exploit prediction
EPSS 19%

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).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.0.2b ≤ v ≤ 1.0.2n1.1.0 ≤ v ≤ 1.1.0g
Vendor states this is fixed in 1.0.2o (unaffected)
Vendor states this is fixed in 1.1.0h (unaffected)

CVSS

Confidentiality
NONE
Integrity
NONE
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-674

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