tomcat: Information disclosure due improper handling of HTTP pipelining
Published Apr 8, 2011
5.0
MEDIUMCVSS 2.0
EPSS 8.69%
Description
The HTTP BIO connector in Apache Tomcat 7.0.x before 7.0.12 does not properly handle HTTP pipelining, which allows remote attackers to read responses intended for other clients in opportunistic circumstances by examining the application data in HTTP packets, related to "a mix-up of responses for requests from different users."
Affected products
No data.
- 7.0.0
- 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
No data.
Red Hat Enterprise Linux 5
tomcat5
Not affected
Red Hat Enterprise Linux 6
tomcat6
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | tomcat5 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | tomcat6 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of Apache Tomcat 5 as shipped with Red Hat Enterprise Linux 5, Red Hat Developer Suite 3, Red Hat Certificate System 7.3, Red Hat Network Satellite 5.3.0 and earlier versions and JBoss Enterprise Web Server 1.0. It did not affect the versions of Apache Tomcat 6 as shipped with Red Hat Enterprise Linux 6 and JBoss Enterprise Web Server 1.0. It also did not affect the versions of jbossweb as shipped with JBoss Enterprise Application Platform 4.3.0 and earlier versions, as this flaw only affects Apache Tomcat 7.0.0 to 7.0.11.
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:P/I:N/A:N
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 | 8.69% (0.08690) | 94.98th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.69% (0.08690) | 94.42th | v5 (v2026.06.15) |
| Mar 30, 2025 | 11.70% (0.11701) | 93.04th | v4 (v2025.03.14) |
| Mar 29, 2025 | 13.11% (0.13113) | 90.16th | v4 (v2025.03.14) |
| Mar 28, 2025 | 11.70% (0.11701) | 93.05th | v4 (v2025.03.14) |
| Mar 27, 2025 | 13.11% (0.13113) | 93.12th | v4 (v2025.03.14) |
| Mar 20, 2025 | 11.70% (0.11701) | 93.12th | v4 (v2025.03.14) |
| Mar 19, 2025 | 13.11% (0.13113) | 93.27th | v4 (v2025.03.14) |
| Mar 17, 2025 | 11.70% (0.11701) | 93.13th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.31% (0.00307) | 70.72th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.31% (0.00307) | 69.09th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.31% (0.00307) | 65.13th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.72% (0.03718) | 85.08th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.72% (0.03718) | 83.56th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.72% (0.03718) | 66.71th | v2 (v2022.01.01) |
References (22)
- http://seclists.org/fulldisclosure/2011/Apr/97 mailing-listx_refsource_FULLDISC
- http://securityreason.com/securityalert/8188 third-party-advisoryx_refsource_SREASON
- http://svn.apache.org/viewvc?view=revision&revision=1086349 x_refsource_CONFIRMPatch
- http://svn.apache.org/viewvc?view=revision&revision=1086352 x_refsource_CONFIRMPatch
- http://tomcat.apache.org/security-7.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/archive/1/517363 mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/47199 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1025303 vdb-entryx_refsource_SECTRACK
- http://www.vupen.com/english/advisories/2011/0894 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2011-1475 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=708969 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66676 vdb-entryx_refsource_XF
- https://github.com/advisories/GHSA-h6c8-rg87-f3pc Advisory
- https://github.com/apache/tomcat/commit/d2e8f2ede7dea39f75f68384f331f38f094e4ed3
- https://github.com/apache/tomcat/commit/fd8a579e0e2379a84826b11700adf396e4ed2041
- https://issues.apache.org/bugzilla/show_bug.cgi?id=50957 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2011-1475
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12374 vdb-entrysignaturex_refsource_OVAL
- https://web.archive.org/web/20120605200856/http://www.securityfocus.com/bid/47199
- https://web.archive.org/web/20170202012852/http://www.securityfocus.com/archive/1/517363
- https://web.archive.org/web/20170317142459/http://www.securitytracker.com/id?1025303
- https://www.cve.org/CVERecord?id=CVE-2011-1475
Change history (0)
No recorded changes yet.