strongSwan up to 5.5.2 ASN.1 Parser Crafted Certificate data processing

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in strongSwan up to 5.5.2. This vulnerability affects unknown code of the component ASN.1 Parser. Such manipulation as part of Crafted Certificate leads to data processing. This vulnerability is documented as CVE-2017-9023. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in strongSwan up to 5.5.2 (Network Encryption Software). Affected by this issue is an unknown function of the component ASN.1 Parser. The manipulation as part of a Crafted Certificate leads to a data processing vulnerability. Using CWE to declare the problem leads to CWE-19. Impacted is availability. CVE summarizes:

The ASN.1 parser in strongSwan before 5.5.3 improperly handles CHOICE types when the x509 plugin is enabled, which allows remote attackers to cause a denial of service (infinite loop) via a crafted certificate.

The weakness was released 06/08/2017 by OSS-Fuzz (Website). The advisory is shared for download at debian.org. This vulnerability is handled as CVE-2017-9023 since 05/16/2017. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 100577 (Debian DLA-973-1 : strongswan security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196796 (Ubuntu Security Notification for Strongswan Vulnerabilities (USN-3301-1)).

Upgrading to version 5.5.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (100577) and SecurityFocus (BID 98756†). Entry connected to this vulnerability is available at VDB-102115. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Data processing
CWE: CWE-19
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100577
Nessus Name: Debian DLA-973-1 : strongswan security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703866
OpenVAS Name: Debian Security Advisory DSA 3866-1 (strongswan - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: strongSwan 5.5.3

Timelineinfo

05/16/2017 🔍
05/30/2017 +14 days 🔍
06/08/2017 +9 days 🔍
06/08/2017 +0 days 🔍
06/08/2017 +0 days 🔍
12/04/2025 +3100 days 🔍

Sourcesinfo

Advisory: USN-3301-1
Researcher: OSS-Fuzz (OSS-Fuzz)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-9023 (🔍)
GCVE (CVE): GCVE-0-2017-9023
GCVE (VulDB): GCVE-100-102116

OVAL: 🔍

SecurityFocus: 98756 - strongSwan CVE-2017-9023 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 06/08/2017 23:31
Updated: 12/04/2025 00:50
Changes: 06/08/2017 23:31 (43), 06/08/2017 23:42 (33), 12/26/2020 15:02 (3), 12/26/2020 15:08 (1), 12/08/2022 09:27 (3), 12/04/2025 00:50 (15)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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