CVE-2020-1935 (GCVE-0-2020-1935)
Vulnerability from cvelistv5
Published
2020-02-24 21:11
Modified
2026-10-08 21:03
Severity ?
CWE
  • HTTP Request Smuggling
Summary
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.
References
https://lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apache.org%3E mailing-list, x_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html mailing-list, x_refsource_MLIST
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html vendor-advisory, x_refsource_SUSE
https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E mailing-list, x_refsource_MLIST
https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3E mailing-list, x_refsource_MLIST
https://www.debian.org/security/2020/dsa-4673 vendor-advisory, x_refsource_DEBIAN
https://www.debian.org/security/2020/dsa-4680 vendor-advisory, x_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html mailing-list, x_refsource_MLIST
https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISC
https://security.netapp.com/advisory/ntap-20200327-0005/ x_refsource_CONFIRM
https://lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75%40%3Cusers.tomcat.apache.org%3E mailing-list, x_refsource_MLIST
https://lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919%40%3Cusers.tomcat.apache.org%3E mailing-list, x_refsource_MLIST
https://lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18%40%3Cusers.tomcat.apache.org%3E mailing-list, x_refsource_MLIST
https://lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7%40%3Cusers.tomcat.apache.org%3E mailing-list, x_refsource_MLIST
https://lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1%40%3Cusers.tomcat.apache.org%3E mailing-list, x_refsource_MLIST
https://usn.ubuntu.com/4448-1/ vendor-advisory, x_refsource_UBUNTU
https://www.oracle.com/security-alerts/cpuoct2020.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISC
https://lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6%40%3Cdev.tomcat.apache.org%3E mailing-list, x_refsource_MLIST
Impacted products
Vendor Product Version
Apache Apache Tomcat Version: Apache Tomcat 9.0.0.M1 to 9.0.30
Version: 8.5.0 to 8.5.50
Version: 7.0.0 to 7.0.99
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