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CVE-2009-3875

17
FAUCET Score

CVE-2009-3875 describes a timing attack vulnerability in the MessageDigest.isEqual function within Sun Java SE's JRE, affecting various JDK and JRE versions across Linux, Microsoft, and Sun platforms. This flaw allows remote attackers to spoof HMAC-based digital signatures, potentially bypassing authentication. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:N/I:P/A:N), it indicates a network-exploitable vulnerability with low attack complexity, leading to potential information integrity compromise. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.5.0CPE matchmatch criteria
cpe:2.3:a:sun:jdk:1.5.0:update1:*:*:*:*:*:*
1.5.0CPE matchmatch criteria
cpe:2.3:a:sun:jdk:1.5.0:update10:*:*:*:*:*:*
1.5.0CPE matchmatch criteria
cpe:2.3:a:sun:jdk:1.5.0:update11:*:*:*:*:*:*
1.5.0CPE matchmatch criteria
cpe:2.3:a:sun:jdk:1.5.0:update11_b03:*:*:*:*:*:*
1.5.0CPE matchmatch criteria
cpe:2.3:a:sun:jdk:1.5.0:update12:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.11%
Probability of exploitation in next 30 days
EPSS Percentile
86.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0311 is in the 81st percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (15)

redhatpatch availablevia redhat_api
Product: Extras for RHEL 3Fixed in: java-1.4.2-ibm-0:1.4.2.13.3-1jpp.1.el3
View patch
redhatpatch availablevia redhat_api
Product: Extras for RHEL 4Fixed in: java-1.6.0-sun-1:1.6.0.17-1jpp.1.el4
View patch
redhatpatch availablevia redhat_api
Product: Extras for RHEL 4Fixed in: java-1.5.0-sun-0:1.5.0.22-1jpp.1.el4
View patch
redhatpatch availablevia redhat_api
Product: Extras for RHEL 4Fixed in: java-1.4.2-ibm-0:1.4.2.13.3-1jpp.1.el4
View patch
redhatpatch availablevia redhat_api
Product: Extras for RHEL 4Fixed in: java-1.5.0-ibm-1:1.5.0.11-1jpp.1.el4
View patch
redhatpatch availablevia redhat_api
Product: Extras for RHEL 4Fixed in: java-1.6.0-ibm-1:1.6.0.7-1jpp.3.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: java-1.6.0-openjdk-1:1.6.0.0-1.7.b09.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Network Satellite Server v 5.3Fixed in: java-1.6.0-ibm-1:1.6.0.7-1jpp.3.el4
View patch
redhatpatch availablevia redhat_api
Product: RHEL 4 for SAPFixed in: java-1.4.2-ibm-0:1.4.2.13.4.sap-1jpp.1.el4_8
View patch
redhatpatch availablevia redhat_api
Product: RHEL 5 for SAPFixed in: java-1.4.2-ibm-0:1.4.2.13.4.sap-1jpp.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Supplementary for Red Hat Enterprise Linux 5Fixed in: java-1.6.0-sun-1:1.6.0.17-1jpp.2.el5
View patch
redhatpatch availablevia redhat_api
Product: Supplementary for Red Hat Enterprise Linux 5Fixed in: java-1.5.0-sun-0:1.5.0.22-1jpp.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Supplementary for Red Hat Enterprise Linux 5Fixed in: java-1.4.2-ibm-0:1.4.2.13.3-1jpp.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Supplementary for Red Hat Enterprise Linux 5Fixed in: java-1.5.0-ibm-1:1.5.0.11-1jpp.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Supplementary for Red Hat Enterprise Linux 5Fixed in: java-1.6.0-ibm-1:1.6.0.7-1jpp.2.el5
View patch

Vendor Advisories (1)

redhatCVE-2009-3875Moderate

OpenJDK MessageDigest.isEqual introduces timing attack vulnerabilities (6863503)

Nov 3, 2009

References

java.sun.com / javase/6/webnotes/6u17.html
lists.apple.com / archives/security-announce/2009/Dec/msg00000.html
lists.apple.com / archives/security-announce/2009/Dec/msg00001.html
lists.opensuse.org / opensuse-security-announce/2009-11/msg00010.html
marc.info
marc.info
marc.info
secunia.com / advisories/37231
Vendor Advisory
secunia.com / advisories/37239
secunia.com / advisories/37386
secunia.com / advisories/37581
secunia.com / advisories/37841
security.gentoo.org / glsa/glsa-200911-02.xml
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11847
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12112
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7549
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7913
sunsolve.sun.com / search/document.do
PatchVendor Advisory
support.apple.com / kb/HT3969
support.apple.com / kb/HT3970
mandriva.com / security/advisories
oracle.com / technetwork/topics/security/cpujan2010-084891.html
redhat.com / support/errata/RHSA-2009-1694.html
securityfocus.com / bid/36881
vupen.com / english/advisories/2009/3131
Vendor Advisory