CVE-2020-1935
tomcat: Mishandling of Transfer-Encoding header allows for HTTP request smuggling
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
En Apache Tomcat versiones 9.0.0.M1 hasta 9.0.30, versiones 8.5.0 hasta 8.5.50 y versiones 7.0.0 hasta 7.0.99, el código de análisis del encabezado HTTP utilizó un enfoque para el análisis de fin de línea que permitió a algunos encabezados HTTP no válidos ser analizados como válidos. Esto conllevó a una posibilidad de Tráfico No Autorizado de Peticiones HTTP si Tomcat se encontraba detrás de un proxy inverso que manejaba incorrectamente el encabezado Transfer-Encoding no válido en una manera particular. Tal proxy inverso es considerado improbable.
A flaw was found in Apache Tomcat. The HTTP header parsing code used an approach to end-of-line (EOL) parsing that allowed some invalid HTTP headers to be parsed as valid. This led to the possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. The highest threat with this vulnerability is system availability.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-12-02 CVE Reserved
- 2020-02-24 CVE Published
- 2024-01-31 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC
References (21)
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Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | >= 7.0.0 <= 7.0.99 Search vendor "Apache" for product "Tomcat" and version " >= 7.0.0 <= 7.0.99" | - |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | >= 8.5.0 <= 8.5.50 Search vendor "Apache" for product "Tomcat" and version " >= 8.5.0 <= 8.5.50" | - |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | >= 9.0.0 <= 9.0.30 Search vendor "Apache" for product "Tomcat" and version " >= 9.0.0 <= 9.0.30" | - |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | - |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone1 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone10 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone11 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone12 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone13 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone14 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone15 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone16 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone17 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone18 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone19 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone2 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone20 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone21 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone22 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone23 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone24 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone25 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone26 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone27 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone3 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone4 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone5 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone6 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone7 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone8 |
Affected
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Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0" | milestone9 |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
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Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | 15.1 Search vendor "Opensuse" for product "Leap" and version "15.1" | - |
Affected
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Netapp Search vendor "Netapp" | Data Availability Services Search vendor "Netapp" for product "Data Availability Services" | - | - |
Affected
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Netapp Search vendor "Netapp" | Oncommand System Manager Search vendor "Netapp" for product "Oncommand System Manager" | >= 3.0.0 <= 3.1.3 Search vendor "Netapp" for product "Oncommand System Manager" and version " >= 3.0.0 <= 3.1.3" | - |
Affected
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Oracle Search vendor "Oracle" | Agile Engineering Data Management Search vendor "Oracle" for product "Agile Engineering Data Management" | 6.2.1.0 Search vendor "Oracle" for product "Agile Engineering Data Management" and version "6.2.1.0" | - |
Affected
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Oracle Search vendor "Oracle" | Agile Product Lifecycle Management Search vendor "Oracle" for product "Agile Product Lifecycle Management" | 9.3.3 Search vendor "Oracle" for product "Agile Product Lifecycle Management" and version "9.3.3" | - |
Affected
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Oracle Search vendor "Oracle" | Agile Product Lifecycle Management Search vendor "Oracle" for product "Agile Product Lifecycle Management" | 9.3.5 Search vendor "Oracle" for product "Agile Product Lifecycle Management" and version "9.3.5" | - |
Affected
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Oracle Search vendor "Oracle" | Agile Product Lifecycle Management Search vendor "Oracle" for product "Agile Product Lifecycle Management" | 9.3.6 Search vendor "Oracle" for product "Agile Product Lifecycle Management" and version "9.3.6" | - |
Affected
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Oracle Search vendor "Oracle" | Communications Element Manager Search vendor "Oracle" for product "Communications Element Manager" | 8.1.1 Search vendor "Oracle" for product "Communications Element Manager" and version "8.1.1" | - |
Affected
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Oracle Search vendor "Oracle" | Communications Element Manager Search vendor "Oracle" for product "Communications Element Manager" | 8.2.0 Search vendor "Oracle" for product "Communications Element Manager" and version "8.2.0" | - |
Affected
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Oracle Search vendor "Oracle" | Communications Element Manager Search vendor "Oracle" for product "Communications Element Manager" | 8.2.1 Search vendor "Oracle" for product "Communications Element Manager" and version "8.2.1" | - |
Affected
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Oracle Search vendor "Oracle" | Communications Instant Messaging Server Search vendor "Oracle" for product "Communications Instant Messaging Server" | 10.0.1.4.0 Search vendor "Oracle" for product "Communications Instant Messaging Server" and version "10.0.1.4.0" | - |
Affected
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Oracle Search vendor "Oracle" | Health Sciences Empirica Inspections Search vendor "Oracle" for product "Health Sciences Empirica Inspections" | 1.0.1.2 Search vendor "Oracle" for product "Health Sciences Empirica Inspections" and version "1.0.1.2" | - |
Affected
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Oracle Search vendor "Oracle" | Health Sciences Empirica Signal Search vendor "Oracle" for product "Health Sciences Empirica Signal" | 7.3.3 Search vendor "Oracle" for product "Health Sciences Empirica Signal" and version "7.3.3" | - |
Affected
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Oracle Search vendor "Oracle" | Hospitality Guest Access Search vendor "Oracle" for product "Hospitality Guest Access" | 4.2.0 Search vendor "Oracle" for product "Hospitality Guest Access" and version "4.2.0" | - |
Affected
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Oracle Search vendor "Oracle" | Hospitality Guest Access Search vendor "Oracle" for product "Hospitality Guest Access" | 4.2.1 Search vendor "Oracle" for product "Hospitality Guest Access" and version "4.2.1" | - |
Affected
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Oracle Search vendor "Oracle" | Hyperion Infrastructure Technology Search vendor "Oracle" for product "Hyperion Infrastructure Technology" | 11.1.2.4 Search vendor "Oracle" for product "Hyperion Infrastructure Technology" and version "11.1.2.4" | - |
Affected
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Oracle Search vendor "Oracle" | Instantis Enterprisetrack Search vendor "Oracle" for product "Instantis Enterprisetrack" | >= 17.1 <= 17.3 Search vendor "Oracle" for product "Instantis Enterprisetrack" and version " >= 17.1 <= 17.3" | - |
Affected
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Oracle Search vendor "Oracle" | Mysql Enterprise Monitor Search vendor "Oracle" for product "Mysql Enterprise Monitor" | >= 4.0.0 <= 4.0.12 Search vendor "Oracle" for product "Mysql Enterprise Monitor" and version " >= 4.0.0 <= 4.0.12" | - |
Affected
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Oracle Search vendor "Oracle" | Mysql Enterprise Monitor Search vendor "Oracle" for product "Mysql Enterprise Monitor" | >= 8.0.0 <= 8.0.20 Search vendor "Oracle" for product "Mysql Enterprise Monitor" and version " >= 8.0.0 <= 8.0.20" | - |
Affected
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Oracle Search vendor "Oracle" | Retail Order Broker Search vendor "Oracle" for product "Retail Order Broker" | 15.0 Search vendor "Oracle" for product "Retail Order Broker" and version "15.0" | - |
Affected
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Oracle Search vendor "Oracle" | Siebel Ui Framework Search vendor "Oracle" for product "Siebel Ui Framework" | <= 20.5 Search vendor "Oracle" for product "Siebel Ui Framework" and version " <= 20.5" | - |
Affected
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Oracle Search vendor "Oracle" | Transportation Management Search vendor "Oracle" for product "Transportation Management" | 6.3.7 Search vendor "Oracle" for product "Transportation Management" and version "6.3.7" | - |
Affected
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Oracle Search vendor "Oracle" | Workload Manager Search vendor "Oracle" for product "Workload Manager" | 12.2.0.1 Search vendor "Oracle" for product "Workload Manager" and version "12.2.0.1" | - |
Affected
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Oracle Search vendor "Oracle" | Workload Manager Search vendor "Oracle" for product "Workload Manager" | 18c Search vendor "Oracle" for product "Workload Manager" and version "18c" | - |
Affected
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Oracle Search vendor "Oracle" | Workload Manager Search vendor "Oracle" for product "Workload Manager" | 19c Search vendor "Oracle" for product "Workload Manager" and version "19c" | - |
Affected
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