CVE-2020-12676
CRITICALCVSS 9.1/10EPSS 2.87%
Last modified
CVE-2020-12676 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. FusionAuth fusionauth-samlv2 0.2.3 allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion attack".. EPSS estimates a 2.87% chance of exploitation in the next 30 days.
Description
FusionAuth fusionauth-samlv2 0.2.3 allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion attack".
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Fusionauth | Samlv2 | 0.2.3 |
References
- http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Oct/1Exploit, Mailing List, Third Party Advisory
- https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txtExploit, Mailing List, Vendor Advisory
- https://github.com/SAMLRaider/SAMLRaiderThird Party Advisory
- https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdfExploit, Third Party Advisory
- http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Oct/1Exploit, Mailing List, Third Party Advisory
- https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txtExploit, Mailing List, Vendor Advisory
- https://github.com/SAMLRaider/SAMLRaiderThird Party Advisory
- https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdfExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-12676?
FusionAuth fusionauth-samlv2 0.2.3 allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion attack".
How severe is CVE-2020-12676?
CVE-2020-12676 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 2.87% probability of exploitation in the next 30 days.
How do I fix CVE-2020-12676?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-12676?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST