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CVE-2012-2739

20
FAUCET Score

CVE-2012-2739 describes a denial-of-service vulnerability in Oracle Java SE and OpenJDK, affecting versions before 7 Update 6 and 7u6 build 12 respectively, and OpenJDK 8 before build 39. This flaw allows attackers to cause high CPU consumption by providing crafted input that triggers predictable hash collisions in applications utilizing hash tables. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:N/I:N/A:P), it is a medium-severity vulnerability that can be exploited remotely with low attack complexity, leading to a denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, indicating low current attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.7.0CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:*:update5:*:*:*:*:*:*
1.7.0CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:1.7.0:*:*:*:*:*:*:*
1.7.0CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:1.7.0:update1:*:*:*:*:*:*
1.7.0CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:1.7.0:update2:*:*:*:*:*:*
1.7.0CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:1.7.0:update3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

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

Exploit Intelligence

EPSS Score
3.17%
Probability of exploitation in next 30 days
EPSS Percentile
86.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0317 is in the 82nd percentile among its peer group of 23,705 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

Vendor Patches (11)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: java-1.5.0-ibm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: java-1.6.0-ibm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: java-1.6.0-sun
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: java-1.5.0-ibm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: java-1.6.0-ibm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: java-1.6.0-openjdk
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: java-1.6.0-sun
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: java-1.5.0-ibm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: java-1.6.0-ibm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: java-1.6.0-openjdk
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: java-1.6.0-sun

Vendor Advisories (1)

redhatCVE-2012-2739Moderate

java: hash table collisions CPU usage DoS (oCERT-2011-003)

Dec 28, 2011

References

armoredbarista.blogspot.de / 2012/02/investigating-hashdos-issue.html
Exploit
mail.openjdk.java.net / pipermail/core-libs-dev/2012-May/010238.html
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
kb.cert.org / vuls/id/903934
US Government Resource
nruns.com / _downloads/advisory28122011.pdf
ocert.org / advisories/ocert-2011-003.html
openwall.com / lists/oss-security/2012/06/15/12
openwall.com / lists/oss-security/2012/06/17/1