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Sukchan Lee f1bbd7b57f sgwc: prevent crash when PGW S5U address is missing in ModifyBearerResponse 
When handling ModifyBearerResponse in the OI (Operation Indication) path,
SGW-C assumed that the PGW S5U tunnel address was always initialized.
If the Bearer Context was not parsed and ul_tunnel->remote_ip remained
unset, building the S11 CreateSessionResponse could trigger an assertion
failure and crash the SGW-C process.

Add a defensive check in sgwc_s5c_handle_modify_bearer_response() to
validate the UL tunnel remote IP before proceeding, and return a proper
GTP error instead of aborting. Also replace an assertion with graceful
error handling in the SxA session modification response path.

This prevents a remotely triggerable SGW-C crash (DoS) caused by malformed
or incomplete ModifyBearerResponse messages.

Issues: #4257
2026-01-12 21:46:27 +09:00
.github Update cifuzz 2025-02-04 21:09:20 +09:00
configs [HR] Implement handling of UE-initiated PDU Session Modification (#2194) 2025-06-30 10:07:06 +09:00
debian Release v2.7.6 2025-07-19 10:32:41 +09:00
docker Replaced deprecated libidn11-dev with libidn-dev across the project. 2025-01-19 12:21:51 +09:00
docs Follow-up on #4213 2025-12-23 15:09:13 +09:00
lib Follow-up on #4220, #4221 2026-01-11 16:02:28 +09:00
misc Add roaming type toggle via command line (#4211) 2025-12-23 13:53:53 +09:00
src sgwc: prevent crash when PGW S5U address is missing in ModifyBearerResponse 2026-01-12 21:46:27 +09:00
subprojects Tested on FreeBSD-14.1-STABLE (#3350) 2024-08-03 21:45:52 +09:00
tests Fix DNN Operator-Identifier format and refactor OI parsing for HR roaming interop 2025-12-06 22:23:34 +09:00
vagrant Tested on FreeBSD-14.1-STABLE (#3350) 2024-08-03 21:45:52 +09:00
webui Changed mongodb default url from localhost to 127.0.0.1 as specified in https://mongoosejs.com/docs/connections.html. This fix incompatibility issues between webui and nodejs 18+ versions. 2025-10-03 23:38:12 +09:00
.clang-tidy [MISC] Add support for static code analysis 2022-07-01 21:38:47 +09:00
.dockerignore [build] Use local sources to build applications (#1583) 2022-06-19 18:18:09 +09:00
.editorconfig editorconfig: new file (#2746) 2023-11-27 22:21:35 +09:00
.gitignore .gitignore: Add install/ dir 2023-10-10 08:03:25 +09:00
LICENSE Change LICENSE to GNU AGPL v3.0 2017-12-18 10:35:54 +09:00
meson.build Release v2.7.6 2025-07-19 10:32:41 +09:00
meson_options.txt [Fuzzing] oss-fuzz support for fuzzing (#2283) 2023-05-05 17:20:11 +09:00
README.md update document 2024-08-24 19:18:55 +09:00

README.md

Open5GS logo

Getting Started

Please follow the documentation at open5gs.org!

Sponsors

If you find Open5GS useful for work, please consider supporting this Open Source project by Becoming a sponsor. To manage the funding transactions transparently, you can donate through OpenCollective.

Special Sponsor

special sponsor mobi

sponsors

Community

  • Problem with Open5GS can be filed as issues in this repository.
  • Other topics related to this project are happening on the discussions.
  • Voice and text chat are available in Open5GS's Discord workspace. Use this link to get started.

Contributing

If you're contributing through a pull request to Open5GS project on GitHub, please read the Contributor License Agreement in advance.

License

Support

Technical support and customized services for Open5GS are provided by NewPlane at support@newplane.io.