GHSA-q4hg-rmq2-52q9 CVE-2019-10072
Improper Locking in Apache Tomcat
High
Maven
- Severity
- 7.5 / 10
- High · CVSS 3.0
- Exploit chance (EPSS)
- 72.99%
- Chance of exploitation in the next 30 days. Higher than 99.45% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-667 Improper Locking
- Fix
9.0.20- Upgrade org.apache.tomcat.embed:tomcat-embed-core to this version or later
Description
The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window exhaustion on write in Apache Tomcat versions 9.0.0.M1 to 9.0.19 and 8.5.0 to 8.5.40 . By not sending WINDOW_UPDATE messages for the connection window (stream 0) clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.
Affected versions
Maven
| Package | Vulnerable | Fixed in |
|---|---|---|
| org.apache.tomcat.embed:tomcat-embed-core | >= 9.0.0.M1, < 9.0.20 |
9.0.20 |
| org.apache.tomcat.embed:tomcat-embed-core | >= 8.5.0, < 8.5.41 |
8.5.41 |
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.embed:tomcat-embed-core Maven → 9.0.20
- maven
<dependency><groupId>org.apache.tomcat.embed</groupId><artifactId>tomcat-embed-core</artifactId><version>9.0.20</version></dependency>- gradle
implementation("org.apache.tomcat.embed:tomcat-embed-core:9.0.20")
Severity breakdown
CVSS 3.0 7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Weakness
CWE-667: Improper Locking
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
How to prevent it
- Implementation: Use industry standard APIs to implement locking mechanism.
References
Advisories
Packages
Other links
- github.com/apache/tomcat/commit/0bcd69c9dd8ae0ff424f2cd46de51583510b7f35
- github.com/apache/tomcat/commit/7f748eb6bfaba5207c89dbd7d5adf50fae847145
- github.com/apache/tomcat/commit/8d14c6f21d29768a39be4b6b9517060dc6606758
- github.com/apache/tomcat/commit/ada725a50a60867af3422c8e612aecaeea856a9a
- security.netapp.com/advisory/ntap-20190625-0002
- support.f5.com/csp/article/K17321505
- tomcat.apache.org/security-8.html
- tomcat.apache.org/security-9.html
- usn.ubuntu.com/4128-1
- usn.ubuntu.com/4128-2
- web.archive.org/web/20200227033743/http://www.securityfocus.com/bid/108874
- debian.org/security/2020/dsa-4680
- oracle.com/security-alerts/cpuApr2021.html
- oracle.com/security-alerts/cpuapr2020.html
- oracle.com/security-alerts/cpujan2020.html
- oracle.com/security-alerts/cpuoct2020.html
- oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- synology.com/security/advisory/Synology_SA_19_29
- lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279…
- lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279…
- lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d…
- lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d…
- lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf…
- lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf…
- lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97…
- lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97…
- lists.apache.org/thread.html/df1a2c1b87c8a6c500ecdbbaf134c7f1491c8d79d98b48c6b9f0fa6a…
- lists.apache.org/thread.html/df1a2c1b87c8a6c500ecdbbaf134c7f1491c8d79d98b48c6b9f0fa6a…
- access.redhat.com/errata/RHSA-2019:3931
- access.redhat.com/errata/RHSA-2019:3929
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-83qj-6fr2-vhqg Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT | Critical Known exploited | Also affects org.apache.tomcat.embed:tomcat-embed-core |
| GHSA-qppj-fm5r-hxr3 HTTP/2 Stream Cancellation Attack | Medium Known exploited | Also affects org.apache.tomcat.embed:tomcat-embed-core |
| GHSA-xjgh-84hx-56c5 Unrestricted Upload of File with Dangerous Type Apache Tomcat | High Known exploited | Also affects org.apache.tomcat.embed:tomcat-embed-core |
| CVE-2020-1938 Improper Privilege Management in Tomcat | Critical Known exploited | Also affects org.apache.tomcat.embed:tomcat-embed-core |
| GHSA-pjfr-qf3p-3q25 When running Apache Tomcat on Windows with HTTP PUTs enabled it was possible to upload a JSP file to the server | High Known exploited | Also affects org.apache.tomcat.embed:tomcat-embed-core |
| GHSA-h3x4-894j-xpx5 Apache Tomcat's FORM authentication process has an Incorrect Authorization vulnerability | Critical | Also affects org.apache.tomcat.embed:tomcat-embed-core |
| GHSA-9xv2-5v5q-p794 Apache Tomcat's DIGEST authenticator has an Authentication Bypass by Capture-replay vulnerability | Critical | Also affects org.apache.tomcat.embed:tomcat-embed-core |
| GHSA-f525-44xv-f2qj Apache Tomcat - HTTP/2 no-authority bypass of strict SNI validation | Critical | Also affects org.apache.tomcat.embed:tomcat-embed-core |
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