CVE-2011-5034

Exp

Apache Geronimo 2.2.1 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters. NOTE: this might overlap CVE-2011-4461.

Published: 2011-12-30 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2011-5034 is rated High Exploit Risk (82.8/100): CVSS High severity, with high exploitation likelihood (EPSS 73.34%, 99th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.03% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-5034

EDB-ID Source Kind Published Link
2012 exploit_db edb 2006-07-15 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-5034

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-18 71.31% 73.34% +2.03%
2 2026-02-03 68.97% 71.31% +2.34%
3 2025-11-20 68.97%

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-5034

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
10.0 6.9 [email protected]

Weakness enumeration for CVE-2011-5034

GitHub Security Advisory for CVE-2011-5034

GHSA-v3h8-rw48-h4gr · Severity: high · Ecosystem: maven — Apache Geronimo Hash Collisions Cause DoS

OS Trackers for CVE-2011-5034

vendor priority summary link
redhat medium https://access.redhat.com/security/cve/CVE-2011-5034

Affected software / configurations for CVE-2011-5034

Vendor Product Version Raw CPE
apache geronimo <= 2.2.1 cpe:2.3:a:apache:geronimo:*:*:*:*:*:*:*:*
apache geronimo 1.0 cpe:2.3:a:apache:geronimo:1.0:*:*:*:*:*:*:*
apache geronimo 1.1 cpe:2.3:a:apache:geronimo:1.1:*:*:*:*:*:*:*
apache geronimo 1.1.1 cpe:2.3:a:apache:geronimo:1.1.1:*:*:*:*:*:*:*
apache geronimo 1.2 cpe:2.3:a:apache:geronimo:1.2:*:*:*:*:*:*:*
apache geronimo 2.0.1 cpe:2.3:a:apache:geronimo:2.0.1:*:*:*:*:*:*:*
apache geronimo 2.0.2 cpe:2.3:a:apache:geronimo:2.0.2:*:*:*:*:*:*:*
apache geronimo 2.1 cpe:2.3:a:apache:geronimo:2.1:*:*:*:*:*:*:*
apache geronimo 2.1.1 cpe:2.3:a:apache:geronimo:2.1.1:*:*:*:*:*:*:*
apache geronimo 2.1.2 cpe:2.3:a:apache:geronimo:2.1.2:*:*:*:*:*:*:*
apache geronimo 2.1.3 cpe:2.3:a:apache:geronimo:2.1.3:*:*:*:*:*:*:*
apache geronimo 2.1.4 cpe:2.3:a:apache:geronimo:2.1.4:*:*:*:*:*:*:*
apache geronimo 2.1.5 cpe:2.3:a:apache:geronimo:2.1.5:*:*:*:*:*:*:*
apache geronimo 2.1.6 cpe:2.3:a:apache:geronimo:2.1.6:*:*:*:*:*:*:*
apache geronimo 2.1.7 cpe:2.3:a:apache:geronimo:2.1.7:*:*:*:*:*:*:*
apache geronimo 2.1.8 cpe:2.3:a:apache:geronimo:2.1.8:*:*:*:*:*:*:*
apache geronimo 2.2 cpe:2.3:a:apache:geronimo:2.2:*:*:*:*:*:*:*

References for CVE-2011-5034

URL Tags
http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html
http://secunia.com/advisories/47412
http://www.kb.cert.org/vuls/id/903934 US Government Resource
http://www.nruns.com/_downloads/advisory28122011.pdf
http://www.ocert.org/advisories/ocert-2011-003.html
https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py
https://lists.apache.org/thread.html/r20957aa5962a48328f199e2373f408aeeae601a45dd5275a195e2b6e%40%3Cjava-dev.axis.apache.org%3E
https://lists.apache.org/thread.html/r360b70489bad65286b49ceb5303a849d2a7ec7d1292774a7259579e1%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/r3c541f019b74902e8e61d73e40ecc2837dfce1b744ad5546919b993c%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/r4fe6b5ff1d48e23337304fd5ac983d89328aecbd1fa198cfc966fbd7%40%3Cdev.geronimo.apache.org%3E
https://lists.apache.org/thread.html/r653f633aa7b6ccbb8c338dbfcea7a00e4ae9d6f3e064a03cab8dc20d%40%3Cjava-dev.axis.apache.org%3E
https://lists.apache.org/thread.html/r67747af92035942c9c413bd8394acbb8a1ace5833c0177014c825bc2%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/r8dc1a0ae0e0cf9d2494b8cbd66562f99331c4cf635e7781850a9b9ba%40%3Cjava-dev.axis.apache.org%3E
https://lists.apache.org/thread.html/ra10015f6f3c3c88b7d813383554e87c06347fe163487148669189b8e%40%3Cdev.geronimo.apache.org%3E
https://lists.apache.org/thread.html/ra1fe29f6399b68980f914d8613dee7f67d62a1a97722fe9cd56f4f5f%40%3Cdev.geronimo.apache.org%3E
https://lists.apache.org/thread.html/rb0e85243d7268f1d7a1edb5e6c7df885dbd300acabaaf4cb0e880518%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/rdd67ea3e489134f653349fc2cb09828ac8462aa61dd776b505a3297a%40%3Cissues.karaf.apache.org%3E
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