CVE-2020-1935
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.
- Score
- CVSS 3.1 4.8 Medium
- Status
- Modified - security@apache.org
- Published
- 2020-02-24
- Last modified
- 2026-10-08
- Weaknesses
- CWE-444
Affected products
- Apache Tomcat (Apache)
- Tomcat (Apache)
- Ubuntu Linux (Canonical)
- Debian Linux (Debian)
- Data Availability Services (Netapp)
- Oncommand System Manager (Netapp)
- Leap (Opensuse)
- Agile Engineering Data Management (Oracle)
- Agile Product Lifecycle Management (Oracle)
- Communications Element Manager (Oracle)
- Communications Instant Messaging Server (Oracle)
- Health Sciences Empirica Inspections (Oracle)
- Health Sciences Empirica Signal (Oracle)
- Hospitality Guest Access (Oracle)
- Hyperion Infrastructure Technology (Oracle)
- Instantis Enterprisetrack (Oracle)
- Mysql Enterprise Monitor (Oracle)
- Retail Order Broker (Oracle)
- Siebel Ui Framework (Oracle)
- Transportation Management (Oracle)
- Workload Manager (Oracle)
References
- https://lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apa…
- https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
- https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apach…
- https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apach…
- https://www.debian.org/security/2020/dsa-4673
- https://www.debian.org/security/2020/dsa-4680
- https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://security.netapp.com/advisory/ntap-20200327-0005/
- https://lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75%40%3Cusers.tomcat.apache…
- https://lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919%40%3Cusers.tomcat.apache…
- https://lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18%40%3Cusers.tomcat.apache…
- https://lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7%40%3Cusers.tomcat.apache…
- https://lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1%40%3Cusers.tomcat.apache…
- https://usn.ubuntu.com/4448-1/
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6%40%3Cdev.tomcat.apache.o…
