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CVE-2018-1336

HIGHCVSS 7.5/10EPSS 20.60%

Last modified

CVE-2018-1336 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 20.60% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
20.60%

97.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
ApacheTomcat>= 7.0.28, <= 7.0.86—
ApacheTomcat>= 8.0.0, <= 8.0.51—
ApacheTomcat>= 8.5.0, <= 8.5.30—
ApacheTomcat>= 9.0.1, <= 9.0.7—
ApacheTomcat8.0.0Rc1
ApacheTomcat9.0.0Milestone10
RedhatJboss Enterprise Application Platform6.0.0—
RedhatJboss Enterprise Application Platform6.4.0—
CanonicalUbuntu Linux14.04—
CanonicalUbuntu Linux16.04—
DebianDebian Linux8.0—
DebianDebian Linux9.0—
RedhatJboss Enterprise Web Server3.0.0—
RedhatJboss Enterprise Web Server5.0.0—
RedhatEnterprise Linux Desktop7.0—
RedhatEnterprise Linux Server7.0—
RedhatEnterprise Linux Workstation7.0—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-1336?
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.
How severe is CVE-2018-1336?
CVE-2018-1336 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 20.60% probability of exploitation in the next 30 days.
How do I fix CVE-2018-1336?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1336?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST