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Servers and applications

CVE-2012-2739

Oracle Java SE before 7 Update 6, and OpenJDK 7 before 7u6 build 12 and 8 before build 39, computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.

Severity
Medium 5.0
Published
28 Nov 2012
Last changed
16 Jun 2026
Added to UpHeron
22 Oct 2026
Exploit chance
3.2% in the next 30 daysHigher than 88% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-310
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
JavaServers and applications · cpe:a:oracle:jdk
  • Every version up to 1.7.0
  • Version 1.7.0
  • Version 1.7.0-update1
  • Version 1.7.0-update2
  • Version 1.7.0-update3
  • Version 1.7.0-update4
JavaServers and applications · cpe:a:oracle:jre
  • Every version up to 1.7.0
  • Version 1.7.0
  • Version 1.7.0-update1
  • Version 1.7.0-update2
  • Version 1.7.0-update3
  • Version 1.7.0-update4
JavaServers and applications · cpe:a:oracle:openjdk
  • Every version up to 1.7.0
  • Version 1.6.0
  • Version 1.8.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2012-2739
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2012-2739