CVE-2018-1336
Publication date 24 July 2018
Last updated 25 August 2025
Ubuntu priority
Description
An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| tomcat7 | 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Fixed 7.0.68-1ubuntu0.4+esm1
|
|
| 14.04 LTS trusty |
Fixed 7.0.52-1ubuntu0.15
|
|
| tomcat8 | 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic |
Fixed 8.5.39-1ubuntu1~18.04.1
|
|
| 16.04 LTS xenial |
Fixed 8.0.32-1ubuntu1.7
|
|
| 14.04 LTS trusty | Not in release | |
| tomcat8.0 | 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release |
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu Pro 30-day free trialPatch details
| Package | Patch details |
|---|---|
| tomcat7 |
|
| tomcat8 |
|
| tomcat8.0 |
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-3723-1
- Tomcat vulnerabilities
- 25 July 2018
- USN-4791-1
- Apache Tomcat 7 vulnerabilities
- 15 March 2021