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CVE-2023-36478 (GCVE-0-2023-36478)

Vulnerability from cvelistv5 – Published: 2023-10-10 16:53 – Updated: 2025-02-13 16:56
VLAI
Title
HTTP/2 HPACK integer overflow and buffer allocation
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-190 - Integer Overflow or Wraparound
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version CPE status
eclipse jetty.project Affected: >= 10.0.0, < 10.0.16
Affected: >= 11.0.0, < 11.0.16
Affected: >= 9.3.0, < 9.4.53
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-04T17:42:55+00:00",
      "cve": "CVE-2023-36478",
      "id": "CVE-2023-36478",
      "initial_release_date": "2023-10-10T00:00:00+00:00",
      "product_status:fixed": "2",
      "product_status:known_affected": "11",
      "product_status:known_not_affected": "44",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "jetty: hpack header values cause denial of service in http/2",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-36478.json",
      "version": "3"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.