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CVE-2020-1935

MEDIUMCVSS 4.8/10EPSS 9.39%

Last modified

CVE-2020-1935 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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. EPSS estimates a 9.39% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
4.8/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability
9.39%

94.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ApacheTomcat>= 7.0.0, <= 7.0.99
ApacheTomcat>= 8.5.0, <= 8.5.50
ApacheTomcat>= 9.0.0, <= 9.0.30
ApacheTomcat9.0.0
DebianDebian Linux8.0
DebianDebian Linux9.0
DebianDebian Linux10.0
CanonicalUbuntu Linux16.04
OpensuseLeap15.1
NetappData Availability ServicesAll versions
NetappOncommand System Manager>= 3.0.0, <= 3.1.3
OracleAgile Engineering Data Management6.2.1.0
OracleAgile Product Lifecycle Management9.3.3
OracleAgile Product Lifecycle Management9.3.5
OracleAgile Product Lifecycle Management9.3.6
OracleCommunications Element Manager8.1.1
OracleCommunications Element Manager8.2.0
OracleCommunications Element Manager8.2.1
OracleCommunications Instant Messaging Server10.0.1.4.0
OracleHealth Sciences Empirica Inspections1.0.1.2
OracleHealth Sciences Empirica Signal7.3.3
OracleHospitality Guest Access4.2.0
OracleHospitality Guest Access4.2.1
OracleHyperion Infrastructure Technology11.1.2.4
OracleInstantis Enterprisetrack>= 17.1, <= 17.3
OracleMysql Enterprise Monitor>= 4.0.0, <= 4.0.12
OracleMysql Enterprise Monitor>= 8.0.0, <= 8.0.20
OracleRetail Order Broker15.0
OracleSiebel Ui Framework<= 20.5
OracleTransportation Management6.3.7
OracleWorkload Manager12.2.0.1
OracleWorkload Manager18c
OracleWorkload Manager19c

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2020-1935?
CVE-2020-1935 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 9.39% probability of exploitation in the next 30 days.
How do I fix CVE-2020-1935?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST