CVE-2023-36478 Details
Eclipse Jetty provides a web server and servlet container. In versions 11.0.0 through 11.0.15, 10.0.0 through 10.0.15, and 9.0.0 through 9.4.52, an integer overflow in `MetaDataBuilder.checkSize` allows for HTTP/2 HPACK header values to
exceed their size limit. `MetaDataBuilder.java` determines if a header name or value exceeds the size limit, and throws an exception if the limit is exceeded. However, when length is very large and huffman is true, the multiplication by 4 in line 295
will overflow, and length will become negative. `(_size+length)` will now be negative, and the check on line 296 will not be triggered. Furthermore, `MetaDataBuilder.checkSize` allows for user-entered HPACK header value sizes to be negative, potentially leading to a very large buffer allocation later on when the user-entered size is multiplied by 2. This means that if a user provides a negative length value (or, more precisely, a length value which, when multiplied by the 4/3 fudge factor, is negative), and this length value is a very large positive number when multiplied by 2, then the user can cause a very large buffer to be allocated on the server. Users of HTTP/2 can be impacted by a remote denial of service attack. The issue has been fixed in versions 11.0.16, 10.0.16, and 9.4.53. There are no known workarounds.
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Exploit prediction scoring system (EPSS) score for CVE-2023-36478
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
2.34 Probability of exploitation activity being observed over the next 30 days (84th percentile)
CVSS score for CVE-2023-36478
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
7.5 High
Products affected by CVE-2023-36478
Jetty 9.3.3
Jetty 9.3.4
Jetty 9.3.5
Jetty 9.3.6
Jetty 9.3.7
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2023-36478 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 16,627 30.03%
CN 6,553 11.83%
DE 5,095 9.20%
FR 2,351 4.25%
GB 1,720 3.11%
IN 1,609 2.91%
JP 1,574 2.84%
SG 1,541 2.78%
KR 1,334 2.41%
CA 1,332 2.41%

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CVE-2023-36478 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 35,883 82.36%
Telecommunications 5,526 12.68%
Education 887 2.04%
Government/Politics 435 1.00%
Business Services 265 0.61%
Healthcare/Wellness 101 0.23%
Retail 93 0.21%
Manufacturing 59 0.14%
Finance 55 0.13%
Utilities 44 0.10%

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