UBUNTU-CVE-2020-1935

    Dashboard / Vulnerabilities / UBUNTU-CVE-2020-1935

    UBUNTU-CVE-2020-1935

    Published: 24 Feb 2020Last Modified: 15 Jul 2026
    Upstream:
    CVE-2020-1935
    Aliases:
    USN-4448-1

    Summary:

    Details: 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://ubuntu.com/security/CVE-2020-1935, https://lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apache.org%3E, https://ubuntu.com/security/notices/USN-4448-1, https://www.cve.org/CVERecord?id=CVE-2020-1935

    Affected packages

    Package

    Name: tomcat7

    Purl: pkg:deb/ubuntu/tomcat7?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    7.0.42-1
    7.0.47-1
    7.0.50-1
    7.0.52-1
    7.0.52-1ubuntu0.1
    7.0.52-1ubuntu0.3
    7.0.52-1ubuntu0.6
    7.0.52-1ubuntu0.7
    7.0.52-1ubuntu0.8
    7.0.52-1ubuntu0.9
    7.0.52-1ubuntu0.10
    7.0.52-1ubuntu0.11
    7.0.52-1ubuntu0.13
    7.0.52-1ubuntu0.14
    7.0.52-1ubuntu0.15
    7.0.52-1ubuntu0.16
    7.0.52-1ubuntu0.16+esm1
    7.0.52-1ubuntu0.16+esm2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2020-1935 | CVE-DB