tomcat: hash table collisions CPU usage DoS (oCERT-2011-003)
Published Jan 5, 2012
5.0
MEDIUMCVSS 2.0
EPSS 79.71%
Description
Apache Tomcat before 5.5.35, 6.x before 6.0.35, and 7.x before 7.0.23 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.
Affected products
No data.
- 5.5.35
- 6.0.0
- 6.0.1
- 6.0.2
- 6.0.3
- 6.0.4
- 6.0.5
- 6.0.6
- 6.0.7
- 6.0.8
- 6.0.9
- 6.0.10
- 6.0.11
- 6.0.12
- 6.0.13
- 6.0.14
- 6.0.15
- 6.0.16
- 6.0.17
- 6.0.18
- 6.0.19
- 6.0.20
- 6.0.21
- 6.0.22
- 6.0.23
- 6.0.24
- 6.0.25
- 6.0.26
- 6.0.27
- 6.0.28
- 6.0.29
- 6.0.30
- 6.0.31
- 6.0.32
- 6.0.33
- 6.0.34
- 7.0.0
- 7.0.1
- 7.0.2
- 7.0.3
- 7.0.4
- 7.0.5
- 7.0.6
- 7.0.7
- 7.0.8
- 7.0.9
- 7.0.10
- 7.0.11
- 7.0.12
- 7.0.13
- 7.0.14
- 7.0.15
- 7.0.16
- 7.0.17
- 7.0.18
- 7.0.19
- 7.0.20
- 7.0.21
- 7.0.22
No data.
JBEWP 5 for RHEL 5
jbossweb-0:2.1.12-3_patch_03.2.ep5.el5
Fixed · RHSA-2012:0076
JBEWP 5 for RHEL 6
jbossweb-0:2.1.12-3_patch_03.2.ep5.el6
Fixed · RHSA-2012:0076
JBoss Communications Platform 5.1
n/a
Fixed · RHSA-2012:0078
JBoss Enterprise BRMS Platform 5.1
n/a
Fixed · RHSA-2012:0325
Red Hat Enterprise Linux 5
tomcat5-0:5.5.23-0jpp.31.el5_8
Fixed · RHSA-2012:0474
Red Hat Enterprise Linux 6
tomcat6-0:6.0.24-36.el6_2
Fixed · RHSA-2012:0475
Red Hat JBoss Enterprise Application Platform 4.3
n/a
Fixed · RHSA-2012:0041
Red Hat JBoss Enterprise Application Platform 5 for RHEL 5
jbossweb-0:2.1.12-3_patch_03.2.ep5.el5
Fixed · RHSA-2012:0074
Red Hat JBoss Enterprise Application Platform 5 for RHEL 6
jbossweb-0:2.1.12-3_patch_03.2.ep5.el6
Fixed · RHSA-2012:0074
Red Hat JBoss Enterprise Application Platform 5.1
n/a
Fixed · RHSA-2012:0075
Red Hat JBoss Enterprise Web Server 1 for RHEL 5
tomcat5-0:5.5.33-27_patch_07.ep5.el5
Fixed · RHSA-2012:0680
Red Hat JBoss Enterprise Web Server 1 for RHEL 5
tomcat6-0:6.0.32-24_patch_07.ep5.el5
Fixed · RHSA-2012:0682
Red Hat JBoss Enterprise Web Server 1 for RHEL 6
tomcat5-0:5.5.33-28_patch_07.ep5.el6
Fixed · RHSA-2012:0680
Red Hat JBoss Enterprise Web Server 1 for RHEL 6
tomcat6-0:6.0.32-24_patch_07.ep5.el6
Fixed · RHSA-2012:0682
Red Hat JBoss Operations Network 2.4
n/a
Fixed · RHSA-2012:0089
Red Hat JBoss Operations Network 3.0
n/a
Fixed · RHSA-2012:0406
Red Hat JBoss Portal 4.3
n/a
Fixed · RHSA-2012:0091
Red Hat JBoss Portal 5.2
n/a
Fixed · RHSA-2012:0325
Red Hat JBoss SOA Platform 5.2
n/a
Fixed · RHSA-2012:0325
Red Hat JBoss Web Platform 5.1
n/a
Fixed · RHSA-2012:0077
Red Hat JBoss Web Server 1.0
n/a
Fixed · RHSA-2012:0681
Red Hat JBoss Web Server 1.0
n/a
Fixed · RHSA-2012:0679
| Product | Package | State | Advisory |
|---|---|---|---|
| JBEWP 5 for RHEL 5 | jbossweb-0:2.1.12-3_patch_03.2.ep5.el5 | Fixed | RHSA-2012:0076 |
| JBEWP 5 for RHEL 6 | jbossweb-0:2.1.12-3_patch_03.2.ep5.el6 | Fixed | RHSA-2012:0076 |
| JBoss Communications Platform 5.1 | n/a | Fixed | RHSA-2012:0078 |
| JBoss Enterprise BRMS Platform 5.1 | n/a | Fixed | RHSA-2012:0325 |
| Red Hat Enterprise Linux 5 | tomcat5-0:5.5.23-0jpp.31.el5_8 | Fixed | RHSA-2012:0474 |
| Red Hat Enterprise Linux 6 | tomcat6-0:6.0.24-36.el6_2 | Fixed | RHSA-2012:0475 |
| Red Hat JBoss Enterprise Application Platform 4.3 | n/a | Fixed | RHSA-2012:0041 |
| Red Hat JBoss Enterprise Application Platform 5 for RHEL 5 | jbossweb-0:2.1.12-3_patch_03.2.ep5.el5 | Fixed | RHSA-2012:0074 |
| Red Hat JBoss Enterprise Application Platform 5 for RHEL 6 | jbossweb-0:2.1.12-3_patch_03.2.ep5.el6 | Fixed | RHSA-2012:0074 |
| Red Hat JBoss Enterprise Application Platform 5.1 | n/a | Fixed | RHSA-2012:0075 |
| Red Hat JBoss Enterprise Web Server 1 for RHEL 5 | tomcat5-0:5.5.33-27_patch_07.ep5.el5 | Fixed | RHSA-2012:0680 |
| Red Hat JBoss Enterprise Web Server 1 for RHEL 5 | tomcat6-0:6.0.32-24_patch_07.ep5.el5 | Fixed | RHSA-2012:0682 |
| Red Hat JBoss Enterprise Web Server 1 for RHEL 6 | tomcat5-0:5.5.33-28_patch_07.ep5.el6 | Fixed | RHSA-2012:0680 |
| Red Hat JBoss Enterprise Web Server 1 for RHEL 6 | tomcat6-0:6.0.32-24_patch_07.ep5.el6 | Fixed | RHSA-2012:0682 |
| Red Hat JBoss Operations Network 2.4 | n/a | Fixed | RHSA-2012:0089 |
| Red Hat JBoss Operations Network 3.0 | n/a | Fixed | RHSA-2012:0406 |
| Red Hat JBoss Portal 4.3 | n/a | Fixed | RHSA-2012:0091 |
| Red Hat JBoss Portal 5.2 | n/a | Fixed | RHSA-2012:0325 |
| Red Hat JBoss SOA Platform 5.2 | n/a | Fixed | RHSA-2012:0325 |
| Red Hat JBoss Web Platform 5.1 | n/a | Fixed | RHSA-2012:0077 |
| Red Hat JBoss Web Server 1.0 | n/a | Fixed | RHSA-2012:0681 |
| Red Hat JBoss Web Server 1.0 | n/a | Fixed | RHSA-2012:0679 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 79.71% (0.79713) | 99.60th | v5 (v2026.06.15) |
| Jun 15, 2026 | 80.32% (0.80318) | 99.57th | v5 (v2026.06.15) |
| Feb 13, 2026 | 76.60% (0.76600) | 98.91th | v4 (v2025.03.14) |
| Dec 1, 2025 | 72.16% (0.72158) | 98.70th | v4 (v2025.03.14) |
| Mar 30, 2025 | 73.86% (0.73855) | 98.74th | v4 (v2025.03.14) |
| Mar 29, 2025 | 78.76% (0.78763) | 98.77th | v4 (v2025.03.14) |
| Mar 17, 2025 | 73.86% (0.73855) | 98.74th | v4 (v2025.03.14) |
| Dec 17, 2024 | 80.92% (0.80925) | 98.58th | v3 (v2023.03.01) |
| Jan 24, 2024 | 65.13% (0.65134) | 97.62th | v3 (v2023.03.01) |
| Oct 4, 2023 | 68.70% (0.68704) | 97.59th | v3 (v2023.03.01) |
| Jun 2, 2023 | 71.31% (0.71306) | 97.57th | v3 (v2023.03.01) |
| Mar 7, 2023 | 79.90% (0.79902) | 97.71th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.34% (0.07344) | 92.59th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.34% (0.07344) | 91.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.34% (0.07344) | 80.64th | v2 (v2022.01.01) |
References (31)
- http://mail-archives.apache.org/mod_mbox/tomcat-announce/201112.mbox/%3c4EFB9800.5010106%40apache.org%3e mailing-listx_refsource_MLIST
- http://mail-archives.apache.org/mod_mbox/tomcat-announce/201112.mbox/%3c4EFB9800.5010106@apache.org%3e
- http://marc.info/?l=bugtraq&m=132871655717248&w=2 vendor-advisoryx_refsource_HP
- http://marc.info/?l=bugtraq&m=133294394108746&w=2 vendor-advisoryx_refsource_HP
- http://marc.info/?l=bugtraq&m=136485229118404&w=2 vendor-advisoryx_refsource_HP
- http://rhn.redhat.com/errata/RHSA-2012-0074.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0075.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0076.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0077.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0078.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0089.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0325.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0406.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/48549 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/48790 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/48791 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/54971 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/55115 third-party-advisoryx_refsource_SECUNIA
- http://tomcat.apache.org/tomcat-7.0-doc/changelog.html x_refsource_CONFIRM
- http://www.debian.org/security/2012/dsa-2401 vendor-advisoryx_refsource_DEBIAN
- http://www.kb.cert.org/vuls/id/903934 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.nruns.com/_downloads/advisory28122011.pdf x_refsource_MISC
- http://www.ocert.org/advisories/ocert-2011-003.html x_refsource_MISC
- http://www.securityfocus.com/bid/51200 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2011-4858 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=750521 x_refsource_CONFIRMIssue Tracking
- https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py x_refsource_MISC
- https://github.com/advisories/GHSA-wr3m-gw98-mc3j Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2011-4858
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18886 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2011-4858
Change history (0)
No recorded changes yet.