Aayush Suri created ZOOKEEPER-4776:
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Summary: CVE-2023-36478 | org.eclipse.jetty_jetty-io
Key: ZOOKEEPER-4776
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4776
Project: ZooKeeper
Issue Type: Bug
Affects Versions: 3.9.1
Reporter: Aayush Suri
{*}Vulnerability 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.
Looking for a version the fixes this vulnerability.
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