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CVE-2020-1935

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Date: February 24, 2020

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.

Language: Java

Severity Score

Related Resources (32)

https://lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18%40%3Cusers.tomcat.apache.org%3E
https://usn.ubuntu.com/4448-1
https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78@%3Ccommits.tomee.apache.org%3E
https://www.oracle.com/security-alerts/cpuoct2020.html
https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743@%3Ccommits.tomee.apache.org%3E
https://lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75%40%3Cusers.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1%40%3Cusers.tomcat.apache.org%3E
https://nvd.nist.gov/vuln/detail/CVE-2020-1935
https://www.debian.org/security/2020/dsa-4673
https://www.oracle.com/security-alerts/cpujan2021.html
https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3E
https://lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apache.org%3E
https://security.netapp.com/advisory/ntap-20200327-0005/
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.debian.org/security/2020/dsa-4680
https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
https://lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7@%3Cusers.tomcat.apache.org%3E
https://security.netapp.com/advisory/ntap-20200327-0005
https://lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6@%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919@%3Cusers.tomcat.apache.org%3E
https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
https://lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75@%3Cusers.tomcat.apache.org%3E
https://access.redhat.com/security/cve/CVE-2020-1935
https://lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1@%3Cusers.tomcat.apache.org%3E
https://lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18@%3Cusers.tomcat.apache.org%3E
https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E
https://usn.ubuntu.com/4448-1/
https://lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7%40%3Cusers.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919%40%3Cusers.tomcat.apache.org%3E
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
https://www.mend.io/vulnerability-database/CVE-2020-1935

Severity Score

Weakness Type (CWE)

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CWE-444

Top Fix

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Upgrade Version

Upgrade to version io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.5.X;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.5.X;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;io.hawt:hawtio-sample-springboot:1.4.15;org.apache.tomcat:tomcat-coyote:7.0.100;org.apache.tomcat:tomcat-coyote:9.0.31;org.apache.tomcat:tomcat-coyote:8.5.51;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.camel:camel-example-spring-boot-metrics:2.17.1;org.apache.tomcat.embed:tomcat-embed-core:8.5.51;org.apache.tomcat.embed:tomcat-embed-core:7.0.100;org.apache.tomcat.embed:tomcat-embed-core:9.0.31;org.apache.tomcat.embed:tomcat-embed-core:8.5.51;org.apache.tomcat.embed:tomcat-embed-core:7.0.100;org.optaweb.employeerostering:employee-rostering-backend:no_fix;org.optaweb.vehiclerouting:optaweb-vehicle-routing-backend:no_fix;org.optaweb.vehiclerouting:optaweb-vehicle-routing-backend:no_fix;org.optaweb.employeerostering:optaweb-employee-rostering-backend:no_fix;org.optaweb.employeerostering:optaweb-employee-rostering-standalone:no_fix;org.apache.camel:camel-example-spring-boot:2.17.1;org.apache.camel:camel-example-spring-boot:2.17.1;org.apache.camel:camel-example-spring-boot:2.17.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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