strongSwan 5.6.1 RSASSA-PSS Signature signature_params.c rsa_pss_params_parse signature verification

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in strongSwan 5.6.1. The impacted element is the function rsa_pss_params_parse of the file libstrongswan/credentials/keys/signature_params.c of the component RSASSA-PSS Signature Handler. Executing a manipulation can lead to signature verification. This vulnerability is handled as CVE-2018-6459. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in strongSwan 5.6.1 (Network Encryption Software). This vulnerability affects the function rsa_pss_params_parse of the file libstrongswan/credentials/keys/signature_params.c of the component RSASSA-PSS Signature Handler. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect availability. CVE summarizes:

The rsa_pss_params_parse function in libstrongswan/credentials/keys/signature_params.c in strongSwan 5.6.1 allows remote attackers to cause a denial of service via a crafted RSASSA-PSS signature that lacks a mask generation function parameter.

The bug was discovered 02/19/2018. The weakness was released 02/20/2018 (Website). The advisory is available at strongswan.org. This vulnerability was named CVE-2018-6459 since 01/31/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 107111 (FreeBSD : strongswan - Insufficient input validation in RSASSA-PSS signature parser (6a449a37-1570-11e8-8e00-000c294a5758)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (107111). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

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

NVD Base Score: 5.3
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: Signature verification
CWE: CWE-347 / CWE-345
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: 107111
Nessus Name: FreeBSD : strongswan - Insufficient input validation in RSASSA-PSS signature parser (6a449a37-1570-11e8-8e00-000c294a5758)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/31/2018 🔍
02/19/2018 +19 days 🔍
02/19/2018 +0 days 🔍
02/20/2018 +1 days 🔍
02/20/2018 +0 days 🔍
02/21/2018 +1 days 🔍
03/02/2018 +9 days 🔍
01/07/2020 +676 days 🔍

Sourcesinfo

Advisory: strongswan.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-6459 (🔍)
GCVE (CVE): GCVE-0-2018-6459
GCVE (VulDB): GCVE-100-113626

Entryinfo

Created: 02/21/2018 07:58
Updated: 01/07/2020 11:16
Changes: 02/21/2018 07:58 (64), 01/07/2020 11:16 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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