Fix IllegalArgumentException for % that is not part of an encoded char

URLs use percentage encoding which replaces unsafe ASCII characters with
a '%' followed by two hexadecimal digits. If there is '%' that is not
followed by two hexadecimal digits Url.decode(String) and the code in
KeyUtil.decode fail with an IllegalArgumentException. To prevent this
replace any '%' that is not followed by two hexadecimal digits by "%25",
which is the URL encoding for '%', before decoding.

Without this fix users can trigger 500 internal server errors in Gerrit
by providing invalid strings for URL parameters (e.g. an invalid project
name for the ListAccess REST endpoint or using an invalid name in a
change identifier).

For context see:
https://stackoverflow.com/questions/6067673/urldecoder-illegal-hex-characters-in-escape-pattern-for-input-string

Release-Notes: Fixed parsing of URL parameters that contain a '%' that is not part of an encoded character
Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I78ba7f34ea1ca511b55889a8d22345c6fb1091ea
Forward-Compatible: yes
5 files changed
tree: bfd8972d54d8e4e1de7255078c2b962a17e9d960
  1. .settings/
  2. .ts-out/
  3. antlr3/
  4. contrib/
  5. Documentation/
  6. e2e-tests/
  7. java/
  8. javatests/
  9. lib/
  10. modules/
  11. plugins/
  12. polygerrit-ui/
  13. prolog/
  14. prologtests/
  15. proto/
  16. resources/
  17. tools/
  18. webapp/
  19. .bazelignore
  20. .bazelproject
  21. .bazelrc
  22. .bazelversion
  23. .editorconfig
  24. .git-blame-ignore-revs
  25. .gitignore
  26. .gitmodules
  27. .gitreview
  28. .mailmap
  29. .pydevproject
  30. .zuul.yaml
  31. BUILD
  32. COPYING
  33. INSTALL
  34. Jenkinsfile
  35. package.json
  36. README.md
  37. SUBMITTING_PATCHES
  38. version.bzl
  39. web-dev-server.config.mjs
  40. WORKSPACE
  41. yarn.lock
README.md

Gerrit Code Review

Gerrit is a code review and project management tool for Git based projects.

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    cd gerrit && bazel build release

Install binary packages (Deb/Rpm)

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On Debian/Ubuntu run:

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NOTE: release is a counter that starts with 1 and indicates the number of packages that have been released with the same version of the software.

On CentOS/RedHat run:

    yum clean all && yum install gerrit-<version>[-<release>]

On Fedora run:

    dnf clean all && dnf install gerrit-<version>[-<release>]

Use pre-built Gerrit images on Docker

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To run a CentOS 8 based Gerrit image:

    docker run -p 8080:8080 gerritcodereview/gerrit[:version]-centos8

To run a Ubuntu 20.04 based Gerrit image:

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NOTE: release is optional. Last released package of the version is installed if the release number is omitted.