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SUSE: CVE-2023-36478: SUSE Linux Security Advisory

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SUSE: CVE-2023-36478: SUSE Linux Security Advisory

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
10/10/2023
Created
10/27/2023
Added
10/27/2023
Modified
10/30/2023

Description

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.

Solution(s)

  • suse-upgrade-jetty-annotations
  • suse-upgrade-jetty-ant
  • suse-upgrade-jetty-cdi
  • suse-upgrade-jetty-client
  • suse-upgrade-jetty-continuation
  • suse-upgrade-jetty-deploy
  • suse-upgrade-jetty-fcgi
  • suse-upgrade-jetty-http
  • suse-upgrade-jetty-http-spi
  • suse-upgrade-jetty-io
  • suse-upgrade-jetty-jaas
  • suse-upgrade-jetty-jmx
  • suse-upgrade-jetty-jndi
  • suse-upgrade-jetty-jsp
  • suse-upgrade-jetty-minimal-javadoc
  • suse-upgrade-jetty-openid
  • suse-upgrade-jetty-plus
  • suse-upgrade-jetty-proxy
  • suse-upgrade-jetty-quickstart
  • suse-upgrade-jetty-rewrite
  • suse-upgrade-jetty-security
  • suse-upgrade-jetty-server
  • suse-upgrade-jetty-servlet
  • suse-upgrade-jetty-servlets
  • suse-upgrade-jetty-start
  • suse-upgrade-jetty-util
  • suse-upgrade-jetty-util-ajax
  • suse-upgrade-jetty-webapp
  • suse-upgrade-jetty-xml

References

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