tomcat: HTTP NIO connector OOM DoS via a request with large headers
Published Nov 16, 2012
5.0
MEDIUMCVSS 2.0
EPSS 8.74%
Description
java/org/apache/coyote/http11/InternalNioInputBuffer.java in the HTTP NIO connector in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.28 does not properly restrict the request-header size, which allows remote attackers to cause a denial of service (memory consumption) via a large amount of header data.
Affected products
No data.
Configuration 1
- 6.0
- 6.0.0
- 6.0.0
- 6.0.1
- 6.0.1
- 6.0.2
- 6.0.2
- 6.0.2
- 6.0.3
- 6.0.4
- 6.0.4
- 6.0.5
- 6.0.6
- 6.0.6
- 6.0.7
- 6.0.7
- 6.0.7
- 6.0.8
- 6.0.8
- 6.0.9
- 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
- 6.0.24
- 6.0.26
- 6.0.27
- 6.0.28
- 6.0.29
- 6.0.30
- 6.0.31
- 6.0.32
- 6.0.33
- 6.0.35
Configuration 2
- 7.0.0
- 7.0.0
- 7.0.1
- 7.0.2
- 7.0.2
- 7.0.3
- 7.0.4
- 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
- 7.0.23
- 7.0.25
No data.
Red Hat JBoss Enterprise Web Server 2 for RHEL 5
tomcat6-0:6.0.35-6_patch_06.ep6.el5
Fixed · RHSA-2013:0266
Red Hat JBoss Enterprise Web Server 2 for RHEL 6
tomcat6-0:6.0.35-29_patch_06.ep6.el6
Fixed · RHSA-2013:0266
Red Hat JBoss Web Server 2.0
n/a
Fixed · RHSA-2013:0265
Red Hat Enterprise Linux 6
tomcat6
Not affected
Red Hat JBoss BRMS 5
jbossweb
Not affected
Red Hat JBoss Data Grid 6
jbossweb
Not affected
Red Hat JBoss Enterprise Web Server 2
tomcat7
Not affected
Red Hat JBoss Operations Network 3
jbossweb
Not affected
Red Hat JBoss Portal 5
jbossweb
Not affected
Red Hat JBoss SOA Platform 5
jbossweb
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat JBoss Enterprise Web Server 2 for RHEL 5 | tomcat6-0:6.0.35-6_patch_06.ep6.el5 | Fixed | RHSA-2013:0266 |
| Red Hat JBoss Enterprise Web Server 2 for RHEL 6 | tomcat6-0:6.0.35-29_patch_06.ep6.el6 | Fixed | RHSA-2013:0266 |
| Red Hat JBoss Web Server 2.0 | n/a | Fixed | RHSA-2013:0265 |
| Red Hat Enterprise Linux 6 | tomcat6 | Not affected | n/a |
| Red Hat JBoss BRMS 5 | jbossweb | Not affected | n/a |
| Red Hat JBoss Data Grid 6 | jbossweb | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | tomcat7 | Not affected | n/a |
| Red Hat JBoss Operations Network 3 | jbossweb | Not affected | n/a |
| Red Hat JBoss Portal 5 | jbossweb | Not affected | n/a |
| Red Hat JBoss SOA Platform 5 | jbossweb | Not affected | n/a |
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 (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 8.74% (0.08742) | 95.00th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.98% (0.08980) | 94.58th | v5 (v2026.06.15) |
| Jan 9, 2026 | 20.28% (0.20282) | 95.31th | v4 (v2025.03.14) |
| Dec 16, 2025 | 15.77% (0.15769) | 94.49th | v4 (v2025.03.14) |
| Dec 10, 2025 | 20.02% (0.20019) | 95.27th | v4 (v2025.03.14) |
| Oct 8, 2025 | 15.77% (0.15769) | 94.40th | v4 (v2025.03.14) |
| Mar 30, 2025 | 12.96% (0.12955) | 93.44th | v4 (v2025.03.14) |
| Mar 29, 2025 | 15.72% (0.15720) | 91.23th | v4 (v2025.03.14) |
| Mar 17, 2025 | 12.96% (0.12955) | 93.51th | v4 (v2025.03.14) |
| Dec 12, 2024 | 5.20% (0.05196) | 93.29th | v3 (v2023.03.01) |
| Dec 11, 2023 | 5.20% (0.05196) | 92.17th | v3 (v2023.03.01) |
| Jun 4, 2023 | 8.97% (0.08975) | 93.69th | v3 (v2023.03.01) |
| Mar 7, 2023 | 12.17% (0.12168) | 94.44th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.39% (0.06394) | 90.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.39% (0.06394) | 90.10th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.39% (0.06394) | 77.96th | v2 (v2022.01.01) |
References (20)
- http://lists.opensuse.org/opensuse-updates/2012-12/msg00089.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2012-12/msg00090.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2013-01/msg00037.html vendor-advisoryx_refsource_SUSE
- http://marc.info/?l=bugtraq&m=136612293908376&w=2 vendor-advisoryx_refsource_HP
- http://marc.info/?l=bugtraq&m=139344343412337&w=2 vendor-advisoryx_refsource_HP
- http://secunia.com/advisories/51371 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/57126 third-party-advisoryx_refsource_SECUNIA
- http://svn.apache.org/viewvc?view=revision&revision=1350301 x_refsource_CONFIRM
- http://svn.apache.org/viewvc?view=revision&revision=1356208 x_refsource_CONFIRM
- http://tomcat.apache.org/security-6.html x_refsource_CONFIRMVendor Advisory
- http://tomcat.apache.org/security-7.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/56402 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1027729 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-1637-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2012-2733 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=873695 Issue Tracking
- https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03748878 vendor-advisoryx_refsource_HP
- https://nvd.nist.gov/vuln/detail/CVE-2012-2733
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19218 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2012-2733
Change history (0)
No recorded changes yet.