Is CVE-2009-0217 in the CISA KEV catalog?

No. CVE-2009-0217 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0217?

CVE-2009-0217 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2009-0217?

CVE-2009-0217 has an EPSS score of 6.35% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-0217?

Upgrade mono on debian 11 to 2.4.2.3+dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2009-0217

MEDIUMEPSS 93th pctl

5.0

CVSS v2

NVD

Description

The design of the W3C XML Signature Syntax and Processing (XMLDsig) recommendation, as implemented in products including (1) the Oracle Security Developer Tools component in Oracle Application Server 10.1.2.3, 10.1.3.4, and 10.1.4.3IM; (2) the WebLogic Server component in BEA Product Suite 10.3, 10.0 MP1, 9.2 MP3, 9.1, 9.0, and 8.1 SP6; (3) Mono before 2.4.2.2; (4) XML Security Library before 1.2.12; (5) IBM WebSphere Application Server Versions 6.0 through 6.0.2.33, 6.1 through 6.1.0.23, and 7.0 through 7.0.0.1; (6) Sun JDK and JRE Update 14 and earlier; (7) Microsoft .NET Framework 3.0 through 3.0 SP2, 3.5, and 4.0; and other products uses a parameter that defines an HMAC truncation length (HMACOutputLength) but does not require a minimum for this length, which allows attackers to spoof HMAC-based signatures and bypass authentication by specifying a truncation length with a small number of bits.

How to fix

Remediation Available

monoDebian

Fixed in:2.4.2.3+dfsg-1CVE-2009-0217

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

6.35%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.