CVE-2020-27978
CVE-2020-27978 is a high-severity vulnerability in Shibboleth Identity Provider with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 2% (76th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-770
- Affected product: Shibboleth Identity Provider
- Published:
- Last modified:
Description
Shibboleth Identify Provider 3.x before 3.4.6 has a denial of service flaw. A remote unauthenticated attacker can cause a login flow to trigger Java heap exhaustion due to the creation of objects in the Java Servlet container session.
Frequently asked questions
- What is CVE-2020-27978?
- Shibboleth Identify Provider 3.x before 3.4.6 has a denial of service flaw. A remote unauthenticated attacker can cause a login flow to trigger Java heap exhaustion due to the creation of objects in the Java Servlet container session.
- How severe is CVE-2020-27978?
- CVE-2020-27978 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2020-27978 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-27978?
- CVE-2020-27978 affects Shibboleth Identity Provider. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-27978?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-27978 published?
- CVE-2020-27978 was published on 2020-10-28 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:shibboleth:identity_provider:*:*:*:*:*:*:*:*
More vulnerabilities in Shibboleth Identity Provider
- CVE-2014-3603 — Medium (CVSS 5.9): The (1) HttpResource and (2) FileBackedHttpResource implementations in Shibboleth Identity Provider (IdP) before 2.4.1…
- CVE-2015-1796 — Medium (CVSS 4.3): The PKIX trust engines in Shibboleth Identity Provider before 2.4.4 and OpenSAML Java (OpenSAML-J) before 2.6.5 trust…
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