GHSA-f268-65qc-98vg BIT-tomcat-2020-13943 CVE-2020-13943
Exposure of Sensitive Information to an Unauthorized Actor in Apache Tomcat
- Severity
- 4.3 / 10
- Medium · CVSS 3.1
- Exploit chance (EPSS)
- 52.64%
- Chance of exploitation in the next 30 days. Higher than 98.97% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
- Fix
10.0.0-M8- Upgrade org.apache.tomcat:tomcat-coyote to this version or later
Description
If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.
Affected versions
Maven
| Package | Vulnerable | Fixed in |
|---|---|---|
| org.apache.tomcat:tomcat-coyote | >= 10.0.0-M1, < 10.0.0-M8 |
10.0.0-M8 |
| org.apache.tomcat:tomcat-coyote | >= 9.0.0-M1, < 9.0.38 |
9.0.38 |
| org.apache.tomcat:tomcat-coyote | >= 8.5.0, < 8.5.58 |
8.5.58 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
org.apache.tomcat:tomcat-coyote Maven → 10.0.0-M8
- maven
<dependency><groupId>org.apache.tomcat</groupId><artifactId>tomcat-coyote</artifactId><version>10.0.0-M8</version></dependency>- gradle
implementation("org.apache.tomcat:tomcat-coyote:10.0.0-M8")
Severity breakdown
CVSS 3.1 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Weakness
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
How to prevent it
- Architecture and Design: Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References
Advisories
Other links
- github.com/apache/tomcat/commit/1bbc650cbc3f08d85a1ec6d803c47ae53a84f3bb
- github.com/apache/tomcat/commit/55911430df13f8c9998fbdee1f9716994d2db59b
- github.com/apache/tomcat/commit/9d7def063b47407a09a2f9202beed99f4dcb292a
- lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f30…
- lists.debian.org/debian-lts-announce/2020/10/msg00019.html
- security.netapp.com/advisory/ntap-20201016-0007
- debian.org/security/2021/dsa-4835
- oracle.com/security-alerts/cpuApr2021.html
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00002.html
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00021.html
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-qppj-fm5r-hxr3 HTTP/2 Stream Cancellation Attack | Medium Known exploited | Also affects org.apache.tomcat:tomcat-coyote |
| GHSA-f525-44xv-f2qj Apache Tomcat - HTTP/2 no-authority bypass of strict SNI validation | Critical | Also affects org.apache.tomcat:tomcat-coyote |
| GHSA-r29c-68gh-xp6x Apache Tomcat - HTTP/2 request headers not validated | Critical | Also affects org.apache.tomcat:tomcat-coyote |
| GHSA-8mc5-53m5-3qj2 Apache Tomcat has an Improper Input Validation vulnerability | Medium | Also affects org.apache.tomcat:tomcat-coyote |
| GHSA-69cc-cv78-qc8g Apache Tomcat: Configured cipher preference order not preserved | High | Also affects org.apache.tomcat:tomcat-coyote |
| GHSA-563x-q5rq-57qp Apache Tomcat has an HTTP Request/Response Smuggling vulnerability | High | Also affects org.apache.tomcat:tomcat-coyote |
| GHSA-mgp5-rv84-w37q Apache Tomcat has an Improper Input Validation vulnerability | High | Also affects org.apache.tomcat:tomcat-coyote |
| GHSA-qq5r-98hh-rxc9 Apache Tomcat - Security constraint bypass with HTTP/0.9 | Low | Also affects org.apache.tomcat:tomcat-coyote |
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