httpd: mod_proxy denial of service
Published Jul 20, 2014
4.3
MEDIUMCVSS 2.0
EPSS 35.54%
Description
The mod_proxy module in the Apache HTTP Server 2.4.x before 2.4.10, when a reverse proxy is enabled, allows remote attackers to cause a denial of service (child-process crash) via a crafted HTTP Connection header.
Affected products
No data.
Configuration 1
- 2.4.6
- 2.4.7
- 2.4.8
- 2.4.9
No data.
Red Hat Enterprise Linux 7
httpd-0:2.4.6-18.el7_0
Fixed · RHSA-2014:0921
Red Hat Software Collections 1 for Red Hat Enterprise Linux 6
httpd24-httpd-0:2.4.6-18.el6
Fixed · RHSA-2014:0922
Red Hat Software Collections 1 for Red Hat Enterprise Linux 6.4 EUS
httpd24-httpd-0:2.4.6-18.el6
Fixed · RHSA-2014:0922
Red Hat Software Collections 1 for Red Hat Enterprise Linux 7
httpd24-httpd-0:2.4.6-21.el7
Fixed · RHSA-2014:0922
Red Hat Directory Server 8
httpd
Not affected
Red Hat Enterprise Linux 5
httpd
Not affected
Red Hat Enterprise Linux 6
httpd
Not affected
Red Hat JBoss Enterprise Application Platform 5
httpd
Not affected
Red Hat JBoss Enterprise Application Platform 6
httpd
Not affected
Red Hat JBoss Enterprise Web Server 1
httpd
Not affected
Red Hat JBoss Enterprise Web Server 2
httpd
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | httpd-0:2.4.6-18.el7_0 | Fixed | RHSA-2014:0921 |
| Red Hat Software Collections 1 for Red Hat Enterprise Linux 6 | httpd24-httpd-0:2.4.6-18.el6 | Fixed | RHSA-2014:0922 |
| Red Hat Software Collections 1 for Red Hat Enterprise Linux 6.4 EUS | httpd24-httpd-0:2.4.6-18.el6 | Fixed | RHSA-2014:0922 |
| Red Hat Software Collections 1 for Red Hat Enterprise Linux 7 | httpd24-httpd-0:2.4.6-21.el7 | Fixed | RHSA-2014:0922 |
| Red Hat Directory Server 8 | httpd | Not affected | n/a |
| Red Hat Enterprise Linux 5 | httpd | Not affected | n/a |
| Red Hat Enterprise Linux 6 | httpd | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 5 | httpd | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | httpd | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 1 | httpd | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | 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 5 and 6, Red Hat JBoss Web Server, and Red Hat JBoss Enterprise Application Platform. These products include httpd 2.2, and only httpd versions 2.4.6 through 2.4.9 include the vulnerable code.
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:M/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 (43 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 35.54% (0.35543) | 98.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 35.54% (0.35543) | 98.25th | v5 (v2026.06.15) |
| Mar 4, 2026 | 57.00% (0.56996) | 98.09th | v4 (v2025.03.14) |
| Mar 1, 2026 | 29.34% (0.29339) | 96.52th | v4 (v2025.03.14) |
| Feb 4, 2026 | 57.00% (0.56996) | 98.06th | v4 (v2025.03.14) |
| Feb 1, 2026 | 29.34% (0.29339) | 96.49th | v4 (v2025.03.14) |
| Jan 4, 2026 | 57.00% (0.56996) | 98.04th | v4 (v2025.03.14) |
| Jan 1, 2026 | 29.34% (0.29339) | 96.46th | v4 (v2025.03.14) |
| Dec 28, 2025 | 57.00% (0.56996) | 98.03th | v4 (v2025.03.14) |
| Dec 27, 2025 | 49.30% (0.49298) | 97.69th | v4 (v2025.03.14) |
| Dec 4, 2025 | 57.00% (0.56996) | 98.01th | v4 (v2025.03.14) |
| Dec 1, 2025 | 29.34% (0.29339) | 96.43th | v4 (v2025.03.14) |
| Nov 4, 2025 | 57.00% (0.56996) | 98.02th | v4 (v2025.03.14) |
| Nov 1, 2025 | 29.34% (0.29339) | 96.40th | v4 (v2025.03.14) |
| Oct 28, 2025 | 57.00% (0.56996) | 98.01th | v4 (v2025.03.14) |
| Oct 27, 2025 | 49.30% (0.49298) | 97.66th | v4 (v2025.03.14) |
| Oct 16, 2025 | 57.00% (0.56996) | 98.01th | v4 (v2025.03.14) |
| Oct 4, 2025 | 60.03% (0.60034) | 98.20th | v4 (v2025.03.14) |
| Oct 1, 2025 | 32.35% (0.32354) | 96.71th | v4 (v2025.03.14) |
| Sep 4, 2025 | 52.56% (0.52565) | 97.86th | v4 (v2025.03.14) |
| Sep 1, 2025 | 25.37% (0.25373) | 96.04th | v4 (v2025.03.14) |
| Aug 4, 2025 | 52.56% (0.52565) | 97.82th | v4 (v2025.03.14) |
| Aug 1, 2025 | 25.37% (0.25373) | 96.02th | v4 (v2025.03.14) |
| Jul 30, 2025 | 52.56% (0.52565) | 97.82th | v4 (v2025.03.14) |
| Jul 4, 2025 | 60.03% (0.60034) | 98.15th | v4 (v2025.03.14) |
| Jul 1, 2025 | 32.35% (0.32354) | 96.66th | v4 (v2025.03.14) |
| Jun 4, 2025 | 50.84% (0.50840) | 97.70th | v4 (v2025.03.14) |
| Jun 1, 2025 | 23.95% (0.23953) | 95.75th | v4 (v2025.03.14) |
| May 4, 2025 | 50.84% (0.50840) | 97.69th | v4 (v2025.03.14) |
| May 1, 2025 | 23.95% (0.23953) | 95.71th | v4 (v2025.03.14) |
| Mar 30, 2025 | 50.84% (0.50840) | 97.63th | v4 (v2025.03.14) |
| Mar 29, 2025 | 55.36% (0.55365) | 97.20th | v4 (v2025.03.14) |
| Mar 17, 2025 | 50.84% (0.50840) | 97.59th | v4 (v2025.03.14) |
| Dec 17, 2024 | 94.19% (0.94192) | 99.38th | v3 (v2023.03.01) |
| Dec 12, 2024 | 96.30% (0.96305) | 99.61th | v3 (v2023.03.01) |
| Mar 1, 2024 | 96.50% (0.96497) | 99.55th | v3 (v2023.03.01) |
| Jan 14, 2024 | 96.72% (0.96716) | 99.58th | v3 (v2023.03.01) |
| Oct 4, 2023 | 96.89% (0.96886) | 99.60th | v3 (v2023.03.01) |
| Aug 14, 2023 | 96.78% (0.96779) | 99.52th | v3 (v2023.03.01) |
| Mar 7, 2023 | 96.89% (0.96886) | 99.46th | 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 (27)
- http://advisories.mageia.org/MGASA-2014-0305.html x_refsource_CONFIRM
- http://httpd.apache.org/security/vulnerabilities_24.html x_refsource_CONFIRMPatchVendor Advisory
- http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html vendor-advisoryx_refsource_APPLE
- http://seclists.org/fulldisclosure/2014/Jul/117 mailing-listx_refsource_FULLDISC
- http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.c x_refsource_CONFIRM
- http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.c?r1=1599486&r2=1610674&diff_format=h x_refsource_CONFIRM
- http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/proxy_util.c x_refsource_CONFIRM
- http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/proxy_util.c?r1=1609680&r2=1610674&diff_format=h x_refsource_CONFIRM
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html x_refsource_CONFIRM
- http://zerodayinitiative.com/advisories/ZDI-14-239/ x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2014-0117 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1120599 x_refsource_CONFIRMIssue Tracking
- https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r83109088737656fa6307bd99ab40f8ff0269ae58d3f7272d7048494a%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r9821b0a32a1d0a1b4947abb6f3630053fcbb2ec905d9a32c2bd4d4ee%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/ra7f6aeb28661fbf826969526585f16856abc4615877875f9d3b35ef4%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%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://nvd.nist.gov/vuln/detail/CVE-2014-0117
- https://support.apple.com/HT204659 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2014-0117
Change history (0)
No recorded changes yet.