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CVE-2012-5568: Apache Tomcat through 7.0.x allows remote attackers to cause a denial of service (daemon outage) via partial H

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MEDIUM 5.0WATCHLISTUPGRADEMITIGATE

CVE-2012-5568 is a medium-severity flaw (CVSS 5.0) affecting tomcat, opensuse. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Apache Tomcat through 7.0.x allows remote attackers to cause a denial of service (daemon outage) via partial HTTP requests, as demonstrated by Slowloris.

Why this priority

  • EPSS top 5%: very likely to be exploited
  • Public exploit reference
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score5.0 (Medium)
EPSS exploit chance9.6% (top 5%)
CISA exploited listNo
Published2012-11-30
Last modified2026-10-09
Publisher (CNA): Red Hat, Inc. · Vendor: apache · opensuse

Share: LinkedIn · X · Reddit

Last updated 2026-10-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

apache tomcat UPGRADE
Affected: >= 7.0.0 and <= 7.0.105
Fixed in: newer than 7.0.105
Safe to downgrade to: a release before 7.0.0
1. Check installed version
apt-cache policy tomcat || rpm -q tomcat || tomcat --version
2. UPGRADE to newer than 7.0.105 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tomcat
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tomcat
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)
apt-cache madison tomcat sudo apt install tomcat=<VERSION_BEFORE_7.0.0> sudo apt-mark hold tomcat
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list tomcat sudo dnf downgrade tomcat-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add tomcat
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
opensuse opensuse MITIGATE
Affected: 11.4 · 12.1 · 12.2
Fixed in: no fixed release known
Safe to downgrade to: a release before 11.4
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-5568?

tomcat: upgrade to newer than 7.0.105; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-5568 being exploited?

CVE-2012-5568 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-5568 affect?

CVE-2012-5568 affects tomcat, opensuse. Severity is medium (CVSS 5.0). Apache Tomcat through 7.0.x allows remote attackers to cause a denial of service (daemon outage) via partial HTTP requests, as demonstrated by Slowloris.

How urgent is CVE-2012-5568?

Priority 51/100. EPSS top 5%: very likely to be exploited; Public exploit reference; On your watchlist

Software pages

Apache Tomcat vulnerabilities

Related CVEs

References

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