GHSA-44qp-qhfv-c7f6 BIT-tomcat-2021-30639 CVE-2021-30639
Improper Handling of Exceptional Conditions in Apache Tomcat
- Severity
- 7.5 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 6.89%
- Chance of exploitation in the next 30 days. Higher than 94.07% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-755 Improper Handling of Exceptional Conditions
- Fix
10.0.5- Upgrade org.apache.tomcat:tomcat to this version or later
Description
A vulnerability in Apache Tomcat allows an attacker to remotely trigger a denial of service. An error introduced as part of a change to improve error handling during non-blocking I/O meant that the error flag associated with the Request object was not reset between requests. This meant that once a non-blocking I/O error occurred, all future requests handled by that request object would fail. Users were able to trigger non-blocking I/O errors, e.g. by dropping a connection, thereby creating the possibility of triggering a DoS. Applications that do not use non-blocking I/O are not exposed to this vulnerability. This issue affects Apache Tomcat 10.0.3 to 10.0.4; 9.0.44; 8.5.64.
Affected versions
Maven
| Package | Vulnerable | Fixed in |
|---|---|---|
| org.apache.tomcat:tomcat | >= 10.0.3, < 10.0.5 |
10.0.5 |
| org.apache.tomcat:tomcat | >= 9.0.0, < 9.0.45 |
9.0.45 |
| org.apache.tomcat:tomcat | < 8.5.65 |
8.5.65 |
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 Maven → 10.0.5
- maven
<dependency><groupId>org.apache.tomcat</groupId><artifactId>tomcat</artifactId><version>10.0.5</version></dependency>- gradle
implementation("org.apache.tomcat:tomcat:10.0.5")
Severity breakdown
CVSS 3.1 7.5
CVSS:3.1/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-755: Improper Handling of Exceptional Conditions
The product does not handle or incorrectly handles an exceptional condition.
References
Advisories
Other links
- kc.mcafee.com/corporate/index
- lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daa…
- lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daa…
- lists.apache.org/thread.html/rd84fae1f474597bdf358f5bdc0a5c453c507bd527b83e8be6b5ea3f…
- security.gentoo.org/glsa/202208-34
- security.netapp.com/advisory/ntap-20210827-0007
- oracle.com/security-alerts/cpujan2022.html
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-69r9-qgr7-g2wj Apache Tomcat Missing Encryption of Sensitive Data vulnerability | High Known exploited | Also affects org.apache.tomcat:tomcat |
| GHSA-h3x4-894j-xpx5 Apache Tomcat's FORM authentication process has an Incorrect Authorization vulnerability | Critical | Also affects org.apache.tomcat:tomcat |
| GHSA-9xv2-5v5q-p794 Apache Tomcat's DIGEST authenticator has an Authentication Bypass by Capture-replay vulnerability | Critical | Also affects org.apache.tomcat:tomcat |
| GHSA-gcx9-497g-6cp6 Apache Tomcat has an Improper Access Control, Incorrect Authorization vulnerability | Critical | Also affects org.apache.tomcat:tomcat |
| GHSA-5m62-pw8w-7w9f Apache Tomcat - Security constraints not correctly applied | Critical | Also affects org.apache.tomcat:tomcat |
| GHSA-9m89-8frq-c98c Apache Tomcat - AJP secret compared in non-constant time | Low | Also affects org.apache.tomcat:tomcat |
| GHSA-5mp6-jrq3-r938 Apache Tomcat: LockOutRealm treats user names as case-sensitive | High | Also affects org.apache.tomcat:tomcat |
| GHSA-h6fc-48rj-7qqh Apache Tomcat - Digest authenticator will authenticate any unknown user | Critical | Also affects org.apache.tomcat:tomcat |
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