MEDIUM
httpd: mod_proxy_ajp remote temporary DoS
Published Sep 19, 2011
4.3
MEDIUMCVSS 2.0
EPSS 22.38%
Description
The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary "error state" in the backend server) via a malformed HTTP request.
Affected products
No data.
Configuration 1
- ≥ 2.2.12 · ≤ 2.2.20
Configuration 2
AND
- 1.0.0
Running on/with
OR
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 6
httpd-0:2.2.15-9.el6_1.3
Fixed · RHSA-2011:1391
Red Hat JBoss Enterprise Web Server 1 for RHEL 5
httpd-0:2.2.17-15.4.ep5.el5
Fixed · RHSA-2012:0542
Red Hat JBoss Enterprise Web Server 1 for RHEL 6
httpd-0:2.2.17-15.4.ep5.el6
Fixed · RHSA-2012:0542
Red Hat JBoss Web Server 1.0
n/a
Fixed · RHSA-2012:0543
Red Hat Enterprise Linux 4
httpd
Not affected
Red Hat Enterprise Linux 5
httpd
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | httpd-0:2.2.15-9.el6_1.3 | Fixed | RHSA-2011:1391 |
| Red Hat JBoss Enterprise Web Server 1 for RHEL 5 | httpd-0:2.2.17-15.4.ep5.el5 | Fixed | RHSA-2012:0542 |
| Red Hat JBoss Enterprise Web Server 1 for RHEL 6 | httpd-0:2.2.17-15.4.ep5.el6 | Fixed | RHSA-2012:0542 |
| Red Hat JBoss Web Server 1.0 | n/a | Fixed | RHSA-2012:0543 |
| Red Hat Enterprise Linux 4 | httpd | Not affected | n/a |
| Red Hat Enterprise Linux 5 | httpd | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of httpd as shipped with Red Hat Enterprise Linux 4 and 5 as this flaw was introduced in version 2.2.12.
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.
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
22.38% 0.22380
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.22380
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 (42 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 22.38% (0.22380) | 97.63th | v5 (v2026.06.15) |
| Jun 15, 2026 | 22.38% (0.22380) | 97.39th | v5 (v2026.06.15) |
| Jun 14, 2026 | 41.34% (0.41339) | 97.50th | v4 (v2025.03.14) |
| Mar 23, 2026 | 34.03% (0.34026) | 96.93th | v4 (v2025.03.14) |
| Mar 4, 2026 | 37.04% (0.37038) | 97.08th | v4 (v2025.03.14) |
| Mar 1, 2026 | 23.67% (0.23675) | 95.91th | v4 (v2025.03.14) |
| Feb 4, 2026 | 37.04% (0.37038) | 97.04th | v4 (v2025.03.14) |
| Feb 1, 2026 | 23.67% (0.23675) | 95.87th | v4 (v2025.03.14) |
| Jan 4, 2026 | 37.04% (0.37038) | 97.02th | v4 (v2025.03.14) |
| Jan 1, 2026 | 23.67% (0.23675) | 95.85th | v4 (v2025.03.14) |
| Dec 28, 2025 | 37.04% (0.37038) | 97.01th | v4 (v2025.03.14) |
| Dec 27, 2025 | 35.99% (0.35986) | 96.96th | v4 (v2025.03.14) |
| Dec 7, 2025 | 37.04% (0.37038) | 96.98th | v4 (v2025.03.14) |
| Dec 4, 2025 | 52.32% (0.52324) | 97.79th | v4 (v2025.03.14) |
| Dec 1, 2025 | 36.80% (0.36798) | 96.99th | v4 (v2025.03.14) |
| Nov 4, 2025 | 52.32% (0.52324) | 97.78th | v4 (v2025.03.14) |
| Nov 1, 2025 | 36.80% (0.36798) | 96.98th | v4 (v2025.03.14) |
| Oct 28, 2025 | 52.32% (0.52324) | 97.77th | v4 (v2025.03.14) |
| Oct 27, 2025 | 51.26% (0.51262) | 97.74th | v4 (v2025.03.14) |
| Oct 4, 2025 | 52.32% (0.52324) | 97.83th | v4 (v2025.03.14) |
| Oct 1, 2025 | 36.80% (0.36798) | 97.04th | v4 (v2025.03.14) |
| Sep 4, 2025 | 51.26% (0.51262) | 97.81th | v4 (v2025.03.14) |
| Sep 1, 2025 | 27.05% (0.27046) | 96.23th | v4 (v2025.03.14) |
| Aug 4, 2025 | 51.26% (0.51262) | 97.77th | v4 (v2025.03.14) |
| Aug 1, 2025 | 27.05% (0.27046) | 96.20th | v4 (v2025.03.14) |
| Jul 30, 2025 | 51.26% (0.51262) | 97.77th | v4 (v2025.03.14) |
| Jul 4, 2025 | 52.32% (0.52324) | 97.78th | v4 (v2025.03.14) |
| Jul 1, 2025 | 36.80% (0.36798) | 96.97th | v4 (v2025.03.14) |
| Jun 4, 2025 | 52.32% (0.52324) | 97.76th | v4 (v2025.03.14) |
| Jun 1, 2025 | 36.80% (0.36798) | 96.95th | v4 (v2025.03.14) |
| May 4, 2025 | 52.32% (0.52324) | 97.75th | v4 (v2025.03.14) |
| May 1, 2025 | 36.80% (0.36798) | 96.91th | v4 (v2025.03.14) |
| Mar 17, 2025 | 52.32% (0.52324) | 97.67th | v4 (v2025.03.14) |
| Dec 17, 2024 | 49.40% (0.49404) | 97.59th | v3 (v2023.03.01) |
| Mar 19, 2024 | 24.81% (0.24809) | 96.55th | v3 (v2023.03.01) |
| Nov 8, 2023 | 31.40% (0.31400) | 96.53th | v3 (v2023.03.01) |
| Oct 8, 2023 | 95.59% (0.95594) | 99.18th | v3 (v2023.03.01) |
| Jun 18, 2023 | 95.83% (0.95829) | 99.15th | v3 (v2023.03.01) |
| Mar 7, 2023 | 95.99% (0.95992) | 99.07th | 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) |
Weaknesses (1)
References (34)
- http://community.jboss.org/message/625307 x_refsource_MISCExploitThird Party Advisory
- http://httpd.apache.org/security/vulnerabilities_22.html#2.2.21 x_refsource_CONFIRMVendor Advisory
- http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html vendor-advisoryx_refsource_APPLEBroken LinkMailing List
- http://marc.info/?l=bugtraq&m=131731002122529&w=2 vendor-advisoryx_refsource_HPIssue TrackingMailing ListThird Party Advisory
- http://marc.info/?l=bugtraq&m=132033751509019&w=2 vendor-advisoryx_refsource_HPIssue TrackingMailing ListThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2012-0542.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2012-0543.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://secunia.com/advisories/46013 third-party-advisoryx_refsource_SECUNIANot ApplicableVendor Advisory
- http://support.apple.com/kb/HT5130 x_refsource_CONFIRMThird Party Advisory
- http://www.apache.org/dist/httpd/Announcement2.2.html x_refsource_CONFIRMBroken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:168 vendor-advisoryx_refsource_MANDRIVABroken Link
- http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html x_refsource_CONFIRMThird Party Advisory
- http://www.redhat.com/support/errata/RHSA-2011-1391.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.securityfocus.com/bid/49616 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id?1026054 vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2011-3348 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=736690 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/69804 vdb-entryx_refsource_XFThird Party AdvisoryVDB Entry
- https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r1d201e3da31a2c8aa870c8314623caef7debd74a13d0f25205e26f15%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r688df6f16f141e966a0a47f817e559312b3da27886f59116a94b273d%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/re2e23465bbdb17ffe109d21b4f192e6b58221cd7aa8797d530b4cd75%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2011-3348
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14941 vdb-entrysignaturex_refsource_OVALThird Party Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18154 vdb-entrysignaturex_refsource_OVALThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2011-3348
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Sep 19, 2011
Updated Aug 6, 2024
Reserved Aug 30, 2011
Link CVE-2011-3348
CISA Vulnrichment
Updated n/a