CVE catalog
CVE-2020-1938
When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to Apache Tomcat. Tomcat treats AJP connections as having higher trust than, for example, a similar HT
- Severity
- Critical · CVSS 9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- Exploitation
- CISA Known Exploited Vulnerabilities
- EPSS
- 99.27% · Oct 25, 2026
Apache Tomcat treats Apache JServ Protocol (AJP) connections as having higher trust than, for example, a similar HTTP connection. If such connections are available to an attacker, they can be exploited.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | tomcat9 | sid | 9.0.122-1 | fixed |
| Debian | tomcat9 | forky | 9.0.122-1 | fixed |
| Debian | tomcat9 | trixie | 9.0.95-1 | fixed |
| Debian | tomcat9 | bookworm | 9.0.70-2 | fixed |
| Cpe | geode | Not reported | Not reported | unknown |
| Cpe | tomcat | Not reported | 7.0.100 | fixed |
| Cpe | tomcat | Not reported | 8.5.51 | fixed |
| Cpe | tomcat | Not reported | 9.0.31 | fixed |
| Cpe | fedora | Not reported | Not reported | unknown |
| Cpe | fedora | Not reported | Not reported | unknown |
| Cpe | fedora | Not reported | Not reported | unknown |
| Cpe | agile_engineering_data_management | Not reported | Not reported | unknown |
| Cpe | agile_product_lifecycle_management | Not reported | Not reported | unknown |
| Cpe | agile_product_lifecycle_management | Not reported | Not reported | unknown |
| Cpe | agile_product_lifecycle_management | Not reported | Not reported | unknown |
| Cpe | communications_element_manager | Not reported | Not reported | unknown |
| Cpe | communications_element_manager | Not reported | Not reported | unknown |
| Cpe | communications_element_manager | Not reported | Not reported | unknown |
| Cpe | communications_instant_messaging_server | Not reported | Not reported | unknown |
| Cpe | health_sciences_empirica_inspections | Not reported | Not reported | unknown |
| Cpe | health_sciences_empirica_signal | Not reported | Not reported | unknown |
| Cpe | hospitality_guest_access | Not reported | Not reported | unknown |
| Cpe | hospitality_guest_access | Not reported | Not reported | unknown |
| Cpe | instantis_enterprisetrack | Not reported | Not reported | unknown |
| Ubuntu | tomcat7 | pro | 7.0.78-1 | vulnerable |
| Ubuntu | tomcat7 | pro | 7.0.78-1ubuntu0.1~esm1 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.21-1ubuntu1 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.29-1 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.30-1 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.30-1ubuntu1 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.30-1ubuntu1.2 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.30-1ubuntu1.3 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.30-1ubuntu1.4 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.1 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.2 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.3 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.3+esm1 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.3+esm2 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.3+esm3 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.3+esm4 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.3+esm5 | vulnerable |
| Ubuntu | tomcat8 | pro | 8.5.39-1ubuntu1~18.04.3+esm6 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3~18.04.1 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.1 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2+esm1 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2+esm2 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2+esm3 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2+esm4 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2+esm5 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2+esm6 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2+esm7 | vulnerable |
| Ubuntu | tomcat9 | pro | 9.0.16-3ubuntu0.18.04.2+esm8 | vulnerable |
| Suse | tomcat | hpe helion openstack 8 | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | openstack cloud 7 | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | openstack cloud 8 | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | openstack cloud crowbar 8 | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | linux enterprise server for sap applications 12 sp2 | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | linux enterprise server for sap applications 12 sp3 | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | linux enterprise server 12 sp2-ltss | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | linux enterprise server 12 sp2-bcl | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | linux enterprise server 12 sp3-ltss | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | linux enterprise server 12 sp3-bcl | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | enterprise storage 5 | 8.0.53-29.22.1 | fixed |
| Suse | tomcat | linux enterprise server for sap applications 12 sp1 | 8.0.53-10.38.1 | fixed |
| Suse | tomcat | linux enterprise server 12 sp1-ltss | 8.0.53-10.38.1 | fixed |
| Suse | tomcat6 | linux enterprise point of sale 11 sp3 | 6.0.53-0.57.13.1 | fixed |
| Suse | tomcat6 | linux enterprise server 11 sp4-ltss | 6.0.53-0.57.13.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | tomcat9 | source | sid | 9.0.31-1 | not yet assigned | Not reported | [952437] |
| Debian | tomcat9 | source | forky | 9.0.31-1 | not yet assigned | Not reported | [952437] |
| Debian | tomcat9 | source | trixie | 9.0.31-1 | not yet assigned | Not reported | [952437] |
| Debian | tomcat9 | source | bookworm | 9.0.31-1 | not yet assigned | Not reported | [952437] |
| Cpe | tomcat | cpe | Not reported | 7.0.100 | Not reported | NVD-CVE-2020-1938 | Not reported |
| Cpe | tomcat | cpe | Not reported | 8.5.51 | Not reported | NVD-CVE-2020-1938 | Not reported |
| Cpe | tomcat | cpe | Not reported | 9.0.31 | Not reported | NVD-CVE-2020-1938 | Not reported |
| Suse | tomcat | rpm | hpe helion openstack 8 | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | openstack cloud 7 | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | openstack cloud 8 | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | openstack cloud crowbar 8 | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | linux enterprise server for sap applications 12 sp2 | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | linux enterprise server for sap applications 12 sp3 | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | linux enterprise server 12 sp2-ltss | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | linux enterprise server 12 sp2-bcl | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | linux enterprise server 12 sp3-ltss | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | linux enterprise server 12 sp3-bcl | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | enterprise storage 5 | 8.0.53-29.22.1 | Not reported | SUSE-SU-2020:0725-1 | Not reported |
| Suse | tomcat | rpm | linux enterprise server for sap applications 12 sp1 | 8.0.53-10.38.1 | Not reported | SUSE-SU-2020:0806-1 | Not reported |
| Suse | tomcat | rpm | linux enterprise server 12 sp1-ltss | 8.0.53-10.38.1 | Not reported | SUSE-SU-2020:0806-1 | Not reported |
| Suse | tomcat6 | rpm | linux enterprise point of sale 11 sp3 | 6.0.53-0.57.13.1 | Not reported | SUSE-SU-2020:14334-1 | Not reported |
| Suse | tomcat6 | rpm | linux enterprise server 11 sp4-ltss | 6.0.53-0.57.13.1 | Not reported | SUSE-SU-2020:14334-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libtomcat9-java]Fixed
Source package: [tomcat9]
Details (2)
9.0.70-2· all · bookwormFixed · Fixed:
9.0.31-1nvd · tomcat9 · debian · bookworm; nvd · tomcat9 · debian · 12
9.0.70-2· all · bookwormFixed · Fixed:
9.0.31-1nvd · tomcat9 · debian · bookworm; nvd · tomcat9 · debian · 12
[Debian 13 (Trixie)]
- [libtomcat9-java]Fixed
Source package: [tomcat9]
Details (2)
9.0.95-1· all · trixieFixed · Fixed:
9.0.31-1nvd · tomcat9 · debian · 13
9.0.95-1· all · trixieFixed · Fixed:
9.0.31-1nvd · tomcat9 · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2020_0855.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2020-1938]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-1938]
- [https://osv.dev/vulnerability/SUSE-SU-2020:0725-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:0806-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:14334-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-1938]
- [https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2021/icsma-21-187-01.json]
- [https://security-tracker.debian.org/tracker/CVE-2020-1938]
- [https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-1938.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2020/wid-sec-w-2023-2480.json]
- [https://www.cisa.gov/known-exploited-vulnerabilities-catalog]
[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [CISA Known Exploited Vulnerabilities (OSINT)] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]