PT-2017-18650 · Strongswan+3 · Strongswan+3

Published 2017-05-30 · Updated 2025-12-03 · CVE-2017-9023

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions strongSwan versions prior to 5.5.3

Description The issue is related to the ASN.1 parser in strongSwan, which improperly handles CHOICE types when the x509 plugin is enabled. This allows remote attackers to cause a denial of service, resulting in an infinite loop, by providing a crafted certificate.

Recommendations For versions prior to 5.5.3, update to version 5.5.3 or later to resolve the issue.

Fix

DoS

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

ALT-PU-2017-1678

CVE-2017-9023

DLA-973-1

DSA-3866-1

OPENSUSE-SU-2024:11411-1

SUSE-SU-2017:1471-1

SUSE-SU-2017:1473-1

USN-3301-1

Affected Products

Alt Linux

Suse

Ubuntu

Strongswan

References · 40

• https://security-tracker.debian.org/tracker/DSA-3866-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-9022 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-9023 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9023 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2017:1473-1 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-3866-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2017-9023 · Vendor Advisory
• https://security-tracker.debian.org/tracker/source-package/strongswan · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-9023 · Vendor Advisory
• http://ubuntu.com/usn/USN-3301-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-9023 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-9023 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3301-1 · Vendor Advisory
• http://debian.org/security/2017/dsa-3866 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-9023 · Vendor Advisory