HIGH
httpd: mod_ssl: infinite loop triggered by client-initiated renegotiation when using OpenSSL 1.1.1
Published Jan 30, 2019
7.5
HIGHCVSS 3.1
EPSS 59.05%
Description
A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop leading to a denial of service. This bug can be only triggered with Apache HTTP Server version 2.4.37 when using OpenSSL version 1.1.1 or later, due to an interaction in changes to handling of renegotiation attempts.
Affected products
-
- Version Apache HTTP Server 2.4.37StatusaffectedConstraints-
- 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 HTTP Server | n/a |
|
Configuration 1
AND
- 2.4.37
Configuration 2
OR
- 12.3.3
- 4.2.0
- 4.2.1
- 17.1
- 17.2
- 17.3
- 7.0
- 7.1
No data.
CloudForms Management Engine 5
httpd
Not affected
Red Hat Enterprise Linux 5
httpd
Not affected
Red Hat Enterprise Linux 6
httpd
Not affected
Red Hat Enterprise Linux 7
httpd
Not affected
Red Hat Enterprise Linux 8
httpd
Not affected
Red Hat JBoss Core Services
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 2
httpd
Not affected
Red Hat JBoss Web Server 3
httpd
Not affected
Red Hat Software Collections
httpd24-httpd
Not affected
Red Hat Virtualization 4
rhvm-appliance
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| CloudForms Management Engine 5 | 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 Enterprise Linux 7 | httpd | Not affected | n/a |
| Red Hat Enterprise Linux 8 | httpd | Not affected | n/a |
| Red Hat JBoss Core Services | 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 2 | httpd | Not affected | n/a |
| Red Hat JBoss Web Server 3 | httpd | Not affected | n/a |
| Red Hat Software Collections | httpd24-httpd | Not affected | n/a |
| Red Hat Virtualization 4 | rhvm-appliance | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
6.5 MEDIUM Red Hat
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
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.
59.05% 0.59055
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.59055
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 2, 2026 | 59.05% (0.59055) | 99.09th | v5 (v2026.06.15) |
| Jun 15, 2026 | 59.94% (0.59942) | 99.01th | v5 (v2026.06.15) |
| May 31, 2026 | 22.91% (0.22908) | 95.99th | v4 (v2025.03.14) |
| May 26, 2026 | 17.39% (0.17386) | 95.15th | v4 (v2025.03.14) |
| Apr 29, 2026 | 18.92% (0.18924) | 95.33th | v4 (v2025.03.14) |
| Mar 8, 2026 | 17.39% (0.17386) | 94.95th | v4 (v2025.03.14) |
| Mar 4, 2026 | 18.92% (0.18924) | 95.18th | v4 (v2025.03.14) |
| Mar 1, 2026 | 7.05% (0.07052) | 91.37th | v4 (v2025.03.14) |
| Feb 4, 2026 | 18.92% (0.18924) | 95.14th | v4 (v2025.03.14) |
| Feb 1, 2026 | 7.05% (0.07052) | 91.31th | v4 (v2025.03.14) |
| Jan 4, 2026 | 18.92% (0.18924) | 95.09th | v4 (v2025.03.14) |
| Jan 1, 2026 | 7.05% (0.07052) | 91.26th | v4 (v2025.03.14) |
| Dec 4, 2025 | 18.92% (0.18924) | 95.07th | v4 (v2025.03.14) |
| Dec 1, 2025 | 7.05% (0.07052) | 91.19th | v4 (v2025.03.14) |
| Nov 22, 2025 | 18.92% (0.18924) | 95.06th | v4 (v2025.03.14) |
| Nov 21, 2025 | 23.73% (0.23734) | 95.78th | v4 (v2025.03.14) |
| Nov 18, 2025 | 53.10% (0.53102) | 97.86th | v4 (v2025.03.14) |
| Nov 4, 2025 | 24.06% (0.24064) | 95.80th | v4 (v2025.03.14) |
| Nov 1, 2025 | 9.44% (0.09438) | 92.49th | v4 (v2025.03.14) |
| Oct 4, 2025 | 24.06% (0.24064) | 95.84th | v4 (v2025.03.14) |
| Oct 1, 2025 | 9.44% (0.09438) | 92.55th | v4 (v2025.03.14) |
| Sep 18, 2025 | 24.87% (0.24871) | 95.96th | v4 (v2025.03.14) |
| Sep 9, 2025 | 29.56% (0.29558) | 96.46th | v4 (v2025.03.14) |
| Sep 4, 2025 | 24.87% (0.24871) | 95.96th | v4 (v2025.03.14) |
| Sep 1, 2025 | 7.49% (0.07493) | 91.47th | v4 (v2025.03.14) |
| Aug 26, 2025 | 24.87% (0.24871) | 95.94th | v4 (v2025.03.14) |
| Aug 4, 2025 | 23.02% (0.23017) | 95.68th | v4 (v2025.03.14) |
| Aug 1, 2025 | 6.79% (0.06786) | 90.98th | v4 (v2025.03.14) |
| Jul 4, 2025 | 22.25% (0.22248) | 95.52th | v4 (v2025.03.14) |
| Jul 1, 2025 | 8.57% (0.08568) | 92.00th | v4 (v2025.03.14) |
| Jun 4, 2025 | 22.25% (0.22248) | 95.48th | v4 (v2025.03.14) |
| Jun 1, 2025 | 8.57% (0.08568) | 91.97th | v4 (v2025.03.14) |
| May 15, 2025 | 22.28% (0.22279) | 95.46th | v4 (v2025.03.14) |
| May 4, 2025 | 18.06% (0.18063) | 94.79th | v4 (v2025.03.14) |
| May 1, 2025 | 6.67% (0.06674) | 90.74th | v4 (v2025.03.14) |
| Apr 15, 2025 | 17.68% (0.17679) | 94.67th | v4 (v2025.03.14) |
| Mar 30, 2025 | 24.54% (0.24536) | 95.66th | v4 (v2025.03.14) |
| Mar 29, 2025 | 46.95% (0.46949) | 96.58th | v4 (v2025.03.14) |
| Mar 24, 2025 | 24.54% (0.24536) | 95.63th | v4 (v2025.03.14) |
| Mar 23, 2025 | 38.77% (0.38765) | 96.83th | v4 (v2025.03.14) |
| Mar 17, 2025 | 24.54% (0.24536) | 95.66th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.83% (0.01826) | 87.89th | v3 (v2023.03.01) |
| Dec 12, 2024 | 0.80% (0.00795) | 82.30th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.97% (0.00969) | 83.41th | v3 (v2023.03.01) |
| Jan 24, 2024 | 1.18% (0.01180) | 83.57th | v3 (v2023.03.01) |
| Jan 9, 2024 | 1.16% (0.01156) | 83.28th | v3 (v2023.03.01) |
| Nov 8, 2023 | 1.15% (0.01146) | 83.12th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.26% (0.01265) | 83.49th | 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 | 45.11% (0.45114) | 97.79th | v2 (v2022.01.01) |
| Feb 3, 2022 | 48.58% (0.48582) | 98.93th | v1 |
| Jan 6, 2022 | 48.58% (0.48582) | 98.91th | v1 |
| Sep 1, 2021 | 17.39% (0.17395) | 97.45th | v1 |
| Jul 21, 2021 | 17.39% (0.17395) | 0.00th | v1 |
| Jun 8, 2021 | 16.70% (0.16700) | 0.00th | v1 |
| Jun 3, 2021 | 15.99% (0.15994) | 0.00th | v1 |
| Apr 14, 2021 | 15.28% (0.15276) | 0.00th | v1 |
Weaknesses (1)
References (24)
- http://www.securityfocus.com/bid/106743 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2019-0190 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1668488 Issue Tracking
- https://httpd.apache.org/security/vulnerabilities_24.html x_refsource_CONFIRMVendor Advisory
- 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/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%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/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%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/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%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/re473305a65b4db888e3556e4dae10c2a04ee89dcff2e26ecdbd860a9%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-2019-0190
- https://security.gentoo.org/glsa/201903-21 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://security.netapp.com/advisory/ntap-20190125-0001/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-0190
- https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISCThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html x_refsource_MISCThird Party Advisory
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Jan 30, 2019
Updated Sep 16, 2024
Reserved Nov 14, 2018
Link CVE-2019-0190
CISA Vulnrichment
Updated n/a