HIGH
isapi_redirect: Mishandled HTTP request paths in jk_isapi_plugin.c can lead to unintended exposure of application resources via the reverse proxy
Published Mar 12, 2018
7.5
HIGHCVSS 3.0
EPSS 46.40%
Description
The IIS/ISAPI specific code in the Apache Tomcat JK ISAPI Connector 1.2.0 to 1.2.42 that normalised the requested path before matching it to the URI-worker map did not handle some edge cases correctly. If only a sub-set of the URLs supported by Tomcat were exposed via IIS, then it was possible for a specially constructed request to expose application functionality through the reverse proxy that was not intended for clients accessing Tomcat via the reverse proxy.
Affected products
-
- Version Apache Tomcat JK ISAPI Connector 1.2.0 to 1.2.42StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat Connectors | n/a |
|
- ≥ 1.2.0 · ≤ 1.2.42
No data.
Red Hat JBoss Core Services
n/a
Fixed · RHSA-2018:1843
Red Hat JBoss Core Services
isapi_redirect
Affected
Red Hat JBoss Enterprise Application Platform 6
web
Affected
Red Hat JBoss Enterprise Web Server 2
web
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat JBoss Core Services | n/a | Fixed | RHSA-2018:1843 |
| Red Hat JBoss Core Services | isapi_redirect | Affected | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | web | Affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | web | Will not fix | 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.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact None
Availability Impact None
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
46.40% 0.46397
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.46397
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (58 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 46.40% (0.46397) | 98.78th | v5 (v2026.06.15) |
| Sep 22, 2026 | 46.40% (0.46397) | 98.76th | v5 (v2026.06.15) |
| Sep 21, 2026 | 67.36% (0.67359) | 99.30th | v5 (v2026.06.15) |
| Sep 6, 2026 | 46.40% (0.46397) | 98.73th | v5 (v2026.06.15) |
| Sep 5, 2026 | 67.36% (0.67359) | 99.28th | v5 (v2026.06.15) |
| Aug 30, 2026 | 46.40% (0.46397) | 98.73th | v5 (v2026.06.15) |
| Aug 28, 2026 | 67.36% (0.67359) | 99.28th | v5 (v2026.06.15) |
| Aug 24, 2026 | 46.40% (0.46397) | 98.72th | v5 (v2026.06.15) |
| Aug 23, 2026 | 67.36% (0.67359) | 99.28th | v5 (v2026.06.15) |
| Aug 1, 2026 | 47.04% (0.47036) | 98.71th | v5 (v2026.06.15) |
| Jul 19, 2026 | 43.05% (0.43046) | 98.58th | v5 (v2026.06.15) |
| Jun 15, 2026 | 44.24% (0.44244) | 98.59th | v5 (v2026.06.15) |
| Jun 2, 2026 | 31.77% (0.31775) | 96.89th | v4 (v2025.03.14) |
| May 20, 2026 | 38.03% (0.38031) | 97.28th | v4 (v2025.03.14) |
| Mar 4, 2026 | 53.85% (0.53851) | 97.95th | v4 (v2025.03.14) |
| Mar 1, 2026 | 14.70% (0.14695) | 94.38th | v4 (v2025.03.14) |
| Feb 4, 2026 | 57.34% (0.57341) | 98.08th | v4 (v2025.03.14) |
| Feb 1, 2026 | 14.70% (0.14695) | 94.34th | v4 (v2025.03.14) |
| Jan 4, 2026 | 57.34% (0.57341) | 98.06th | v4 (v2025.03.14) |
| Jan 1, 2026 | 14.70% (0.14695) | 94.31th | v4 (v2025.03.14) |
| Dec 4, 2025 | 57.34% (0.57341) | 98.03th | v4 (v2025.03.14) |
| Dec 1, 2025 | 14.70% (0.14695) | 94.26th | v4 (v2025.03.14) |
| Nov 21, 2025 | 57.34% (0.57341) | 98.03th | v4 (v2025.03.14) |
| Nov 18, 2025 | 55.95% (0.55947) | 98.01th | v4 (v2025.03.14) |
| Nov 4, 2025 | 44.51% (0.44510) | 97.41th | v4 (v2025.03.14) |
| Nov 1, 2025 | 8.71% (0.08706) | 92.12th | v4 (v2025.03.14) |
| Oct 28, 2025 | 44.51% (0.44510) | 97.40th | v4 (v2025.03.14) |
| Oct 4, 2025 | 51.05% (0.51046) | 97.78th | v4 (v2025.03.14) |
| Oct 1, 2025 | 11.37% (0.11373) | 93.33th | v4 (v2025.03.14) |
| Sep 26, 2025 | 51.05% (0.51046) | 97.79th | v4 (v2025.03.14) |
| Sep 4, 2025 | 58.38% (0.58383) | 98.13th | v4 (v2025.03.14) |
| Sep 1, 2025 | 15.34% (0.15337) | 94.41th | v4 (v2025.03.14) |
| Aug 4, 2025 | 58.38% (0.58383) | 98.10th | v4 (v2025.03.14) |
| Aug 1, 2025 | 15.34% (0.15337) | 94.38th | v4 (v2025.03.14) |
| Jul 16, 2025 | 58.38% (0.58383) | 98.08th | v4 (v2025.03.14) |
| Jul 4, 2025 | 56.73% (0.56727) | 97.98th | v4 (v2025.03.14) |
| Jul 1, 2025 | 11.65% (0.11648) | 93.37th | v4 (v2025.03.14) |
| Jun 4, 2025 | 56.73% (0.56727) | 97.97th | v4 (v2025.03.14) |
| Jun 1, 2025 | 11.65% (0.11648) | 93.31th | v4 (v2025.03.14) |
| May 4, 2025 | 56.73% (0.56727) | 97.96th | v4 (v2025.03.14) |
| May 1, 2025 | 11.65% (0.11648) | 93.29th | v4 (v2025.03.14) |
| Mar 30, 2025 | 56.73% (0.56727) | 97.93th | v4 (v2025.03.14) |
| Mar 29, 2025 | 62.63% (0.62625) | 97.69th | v4 (v2025.03.14) |
| Mar 17, 2025 | 56.73% (0.56727) | 97.90th | v4 (v2025.03.14) |
| Dec 17, 2024 | 12.54% (0.12544) | 95.42th | v3 (v2023.03.01) |
| Nov 8, 2023 | 26.27% (0.26269) | 96.25th | v3 (v2023.03.01) |
| Oct 30, 2023 | 79.47% (0.79472) | 97.93th | v3 (v2023.03.01) |
| Aug 3, 2023 | 81.69% (0.81687) | 97.91th | v3 (v2023.03.01) |
| Jul 12, 2023 | 84.67% (0.84667) | 98.02th | v3 (v2023.03.01) |
| Jul 8, 2023 | 89.12% (0.89120) | 98.25th | v3 (v2023.03.01) |
| Mar 24, 2023 | 91.64% (0.91640) | 98.32th | v3 (v2023.03.01) |
| Mar 7, 2023 | 91.21% (0.91207) | 98.26th | v3 (v2023.03.01) |
| Mar 6, 2023 | 26.10% (0.26100) | 97.08th | v2 (v2022.01.01) |
| Feb 4, 2022 | 26.10% (0.26100) | 95.69th | v2 (v2022.01.01) |
| Feb 3, 2022 | 22.19% (0.22190) | 94.78th | v1 |
| Jan 6, 2022 | 22.19% (0.22190) | 94.72th | v1 |
| Sep 1, 2021 | 22.19% (0.22190) | 98.02th | v1 |
| Apr 14, 2021 | 22.19% (0.22190) | 0.00th | v1 |
References (14)
- http://tomcat.apache.org/security-jk.html#Fixed_in_Apache_Tomcat_JK_Connector_1.2.43
- http://www.securityfocus.com/bid/103389 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:1843 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-1323 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1554647 Issue Tracking
- https://lists.apache.org/thread.html/277d42b48b6e9aef50949c0dcc79ce21693091d73da246b3c1981925%40%3Cdev.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/5b7a23e245c93235c503900da854a143596d901bf1a1f67e851a5de4%40%3Cdev.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/6e146bce83578bd870893250ba8354e28f9d8e86c674c30dbeee529f%40%3Cannounce.tomcat.apache.org%3E x_refsource_MISC
- https://lists.apache.org/thread.html/8d2a579bbd977c225c70cb23b0ec54865fb0dab5da3eff1e060c9935%40%3Cdev.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/ba661b0edd913b39ff129a32d855620dd861883ade05fd88a8ce517d%40%3Cdev.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r5c616dfc49156e4b06ffab842800c80f4425924d0f20c452c127a53c%40%3Cdev.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rf8e8c091182b45daa50d3557cad9b10bb4198e3f08cf8f1c66a1b08d%40%3Cdev.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2018-1323
- https://www.cve.org/CVERecord?id=CVE-2018-1323
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Mar 12, 2018
Updated Sep 17, 2024
Reserved Dec 7, 2017
Link CVE-2018-1323
CISA Vulnrichment
Updated n/a