Patch

CVE-2024-56337

with vRx

Vulnerability Overview

CVE Name

CVE-2024-56337

Severity

9.8

Critical

CVE Description

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.1, from 10.1.0-M1 through 10.1.33, from 9.0.0.M1 through 9.0.97. The mitigation for CVE-2024-50379 was incomplete...

Show less

Latest Patch info

There is no patch available at the moment, but you can use our script.

Patch Name

Date

Script

Script Type

Remediation script

Copy script

📜This script mitigates a known vulnerability in specific versions of Apache Tomcat, where improper handling of the sun.io.useCanonCaches property could lead to security risks. By setting this property explicitly in the setenv.sh configuration file, the script ensures the system is no longer vulnerable without requiring a software update. 🚀The vulnerability affects Apache Tomcat versions 9.0.98 and below, 10.1.0 to 10.1.34, and 11.0.0 to 11.0.2 when paired with Java versions 1.8, 11, or 17. Systems with these configurations could be at risk if the sun.io.useCanonCaches property is not set to false for Java versions 1.8 or 11, or remains true for Java version 17. This script: Locates the catalina.sh script to identify the Tomcat installation directory. Creates or modifies the setenv.sh file in the bin directory of the Tomcat installation. Adds the required JAVA_OPTS configuration to mitigate the vulnerability. Notifies the user to restart Tomcat for the changes to take effect. 🛠️Leaving this vulnerability unaddressed could expose your systems to potential security breaches, allowing attackers to exploit improperly handled file system canonicalization. By applying this mitigation, you ensure the security and integrity of your Apache Tomcat setup without needing to perform disruptive updates.

Read less

TOMCAT_BIN_PATH=$(find / -name "catalina.sh" 2>/dev/null | head -n 1)

# Verify if catalina.sh was found
if [[ -z "$TOMCAT_BIN_PATH" ]]; then
    echo "catalina.sh not found. Please check if Tomcat is installed correctly."
    exit 1
fi

# Get the version of Tomcat
TOMCAT_VERSION=$("$TOMCAT_BIN_PATH" version 2>&1 | grep "Server version" | awk -F/ '{print $2}' | awk '{print $1}')
echo "Apache Tomcat version: $TOMCAT_VERSION"

# Get the version of Java
JAVA_VERSION=$(java -version 2>&1 | head -n 1 | awk -F '"' '{print $2}')
echo "Java version: $JAVA_VERSION"

# Check the configuration of sun.io.useCanonCaches
JAVA_OPTS=$(ps aux | grep '[j]ava' | grep -o 'sun.io.useCanonCaches=[^ ]*')
if [[ -z "$JAVA_OPTS" ]]; then
    echo "The property sun.io.useCanonCaches is not explicitly configured."
else
    echo "Current configuration of sun.io.useCanonCaches: $JAVA_OPTS"
fi

# Function to compare versions
compare_versions() {
    # Returns 1 if the first version is greater, 2 if it is smaller, 0 if they are equal
    if [[ "$1" == "$2" ]]; then
        echo 0
        return
    fi

IFS='.' read -r -a version1 <<< "$1"
    IFS='.' read -r -a version2 <<< "$2"

for i in {0..2}; do
        if [[ -z "${version1[i]}" ]]; then
            version1[i]=0
        fi
        if [[ -z "${version2[i]}" ]]; then
            version2[i]=0
        fi

if (( version1[i] > version2[i] )); then
            echo 1
            return
        elif (( version1[i] < version2[i] )); then
            echo 2
            return
        fi
    done

echo 0
}

# Determine vulnerability
if [[ $(compare_versions "$TOMCAT_VERSION" "9.0.98") -eq 2 ]] || \
   ([[ $(compare_versions "$TOMCAT_VERSION" "10.1.0") -eq 1 ]] && [[ $(compare_versions "$TOMCAT_VERSION" "10.1.34") -eq 2 ]]) || \
   ([[ $(compare_versions "$TOMCAT_VERSION" "11.0.0") -eq 1 ]] && [[ $(compare_versions "$TOMCAT_VERSION" "11.0.2") -eq 2 ]]); then

echo "The Tomcat version is vulnerable."

if [[ "$JAVA_VERSION" == 1.8* || "$JAVA_VERSION" == 11* ]]; then
        if [[ "$JAVA_OPTS" != "sun.io.useCanonCaches=false" ]]; then
            echo "The system is vulnerable. It is required to set sun.io.useCanonCaches=false."
        else
            echo "The configuration of sun.io.useCanonCaches is adequate."
        fi
    elif [[ "$JAVA_VERSION" == 17* ]]; then
        if [[ "$JAVA_OPTS" == "sun.io.useCanonCaches=true" ]]; then
            echo "The system is vulnerable. It is required to set sun.io.useCanonCaches=false."
        else
            echo "The configuration of sun.io.useCanonCaches is adequate."
        fi
    else
        echo "No additional configuration is required for this version of Java."
    fi
else
    echo "The Tomcat version is not vulnerable."
fi

Copy script

Affected OS & Apps

No items found.

4.8

Patch faster and smarter
with vRx

Thank you! Your submission has been received!

Oops! Something went wrong while submitting the form.

Trusted by 600+ customers:

Solution

‍Remediate faster with vRx

Patch Management

vRx automatically deploys patches across all systems, cutting patching time by 80%.

Scripting Engine

vRx’s scripting engine solves complex vulnerabilities, like log4j, with built-in or custom scripts.

Patchless Protection

vRx’s Patchless Protection secures vulnerable apps and reduces risk while maintaining functionality.

Book a demo

4.9

4.8

4.9

Hear from our Customers

Valuable resources saved

"Before vRx, we would spend countless hours manually finding and verifying patches. We saved so much time (and headache!)."

Anonymous IT Operations Lead

IT Operations Lead

Third-party software patching is the most valuable feature.

"We have automated third-party patching on specific software, improving efficiency by 80%. vRx has reduced our patching time, which has improved our operations. It is more robust than other solutions because it offers better third-party remediation."

Billy Turner

VP, Managed Technology & Services

Single source of truth, capable of handling any application in our fleet

"vRx gives a single pane of glass to see what patches needed to go out and what sort of vulnerabilities we have on our Windows machines. Our meantime to remediate vulnerabilities has gone down by about 60% to 70%."

Peter Fallowfield

IT Manager

60% faster remediation, many hours saved

"Typically, with our previous solution of ManageEngine, it took about three hours to patch Windows Server, and now, that is less than an hour. It means less downtime for the business each month when we do patches."

Anonymous Security Analyst

Security Analyst

Great patching capabilities, helpful dashboard, and excellent support

"vRx has saved us an incredible amount of time. We can just rely on the automated system and the schedules we've set. It's a huge time saver. It's saved us hundreds of hours."

Michael Cortez

Sr. Director of IT

My favorite feature is Patchless Protection

"With Vicarius' vRx, I've never seen a patch that failed or had to be rolled back. We're saving quite a bit of time. Our clients using vRx haven't had any issues, and they've easily established patching for all their endpoints. "

Jeremy Herman

Security Engineer

Unified vulnerability discovery, prioritization, and remediation

"Vicarius streamlines vulnerability management between IT & Security by directly linking identified vulnerabilities to required patches, enhancing efficiency. The automation process has saved at least 30 percent of our manual tasks."

Wayne Ajimine

Information Security Professional

Patchless Protection is an incredible technology!

"vRx reduces the time customers spend on patching by reducing the overhead on the administrators, allowing them to do additional work. It saves time they would spend addressing the patching process, follow-ups, etc."

Antwune Gray

VP IT Security and Services