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[email protected]CVE-2020-1935

HistoryFeb 24, 2020 - 10:15 p.m.

CVE-2020-1935

2020-02-2422:15:11

CWE-444

[email protected]

web.nvd.nist.gov

1034

apache tomcat

http header

parsing

vulnerability

cve-2020-1935

nvd

5.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

4.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

7.4 High

AI Score

Confidence

Low

0.002 Low

EPSS

Percentile

62.2%

JSON

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.

Affected configurations

Vulners

NVD

Node

apachetomcatRange9.0.0.M1–9.0.30

apachetomcatRange8.5.0–8.5.50

apachetomcatRange7.0.0–7.0.99

CPENameOperatorVersion
apache:tomcatapache tomcatle7.0.99
apache:tomcatapache tomcatle8.5.50
apache:tomcatapache tomcatle9.0.30
apache:tomcatapache tomcateq9.0.0

CPE	Name	Operator	Version
apache:tomcat	apache tomcat	le	7.0.99
apache:tomcat	apache tomcat	le	8.5.50
apache:tomcat	apache tomcat	le	9.0.30
apache:tomcat	apache tomcat	eq	9.0.0

CNA Affected

[
  {
    "product": "Apache Tomcat",
    "vendor": "Apache",
    "versions": [
      {
        "status": "affected",
        "version": "Apache Tomcat 9.0.0.M1 to 9.0.30"
      },
      {
        "status": "affected",
        "version": "8.5.0 to 8.5.50"
      },
      {
        "status": "affected",
        "version": "7.0.0 to 7.0.99"
      }
    ]
  }
]