CVE-2009-3877

CVE-2009-3877 is a medium-severity vulnerability in Sun Jdk with a CVSS 2.0 base score of 5.0. 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-399.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 5% (91st percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Sun Jdk
• Published: 2009-11-05
• Last modified: 2026-06-16

Description

Unspecified vulnerability in Sun Java SE in JDK and JRE 5.0 before Update 22, JDK and JRE 6 before Update 17, SDK and JRE 1.3.x before 1.3.1_27, and SDK and JRE 1.4.x before 1.4.2_24 allows remote attackers to cause a denial of service (memory consumption) via crafted HTTP headers, which are not properly parsed by the ASN.1 DER input stream parser, aka Bug Id 6864911.

Frequently asked questions

What is CVE-2009-3877?

Unspecified vulnerability in Sun Java SE in JDK and JRE 5.0 before Update 22, JDK and JRE 6 before Update 17, SDK and JRE 1.3.x before 1.3.1_27, and SDK and JRE 1.4.x before 1.4.2_24 allows remote attackers to cause a denial of service (memory consumption) via crafted HTTP headers, which are not properly parsed by the ASN.1 DER input stream parser, aka Bug Id 6864911.

How severe is CVE-2009-3877?

CVE-2009-3877 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-3877 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3877?

CVE-2009-3877 primarily affects Sun Jdk. In total, 208 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3877?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-3877 published?

CVE-2009-3877 was published on 2009-11-05 and last updated on 2026-06-16.

References

• http://java.sun.com/javase/6/webnotes/6u17.html
• http://lists.apple.com/archives/security-announce/2009/Dec/msg00000.html
• http://lists.apple.com/archives/security-announce/2009/Dec/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00010.html
• http://marc.info/?l=bugtraq&m=126566824131534&w=2
• http://marc.info/?l=bugtraq&m=131593453929393&w=2
• http://secunia.com/advisories/37231
• http://secunia.com/advisories/37239
• http://secunia.com/advisories/37386
• http://secunia.com/advisories/37581
• http://secunia.com/advisories/37841
• http://security.gentoo.org/glsa/glsa-200911-02.xml
• http://sunsolve.sun.com/search/document.do?assetkey=1-66-270476-1
• http://support.apple.com/kb/HT3969
• http://support.apple.com/kb/HT3970
• http://www.mandriva.com/security/advisories?name=MDVSA-2010:084
• http://www.oracle.com/technetwork/topics/security/cpujan2010-084891.html
• http://www.redhat.com/support/errata/RHSA-2009-1694.html
• http://www.securityfocus.com/bid/36881
• http://www.vupen.com/english/advisories/2009/3131
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10469
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12232
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7148
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8330

Affected products (208)

• cpe:2.3:a:sun:jdk:1.5.0:update1:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update10:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update11:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update11_b03:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update12:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update13:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update14:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update15:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update16:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update17:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update18:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update19:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update2:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update20:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update21:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update3:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update4:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update5:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update6:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update7:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update7_b03:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update8:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.5.0:update9:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update1:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update10:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update11:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update12:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update13:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update14:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update15:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update16:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update2:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update3:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update4:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update5:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update6:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update7:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update8:*:*:*:*:*:*
• cpe:2.3:a:sun:jdk:1.6.0:update9:*:*:*:*:*:*
• cpe:2.3:a:sun:jre:1.4.2_1:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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• CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
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• CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
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