2bb5c9b555
Per MQTT 3.1.1 sections 3.13.1 and 3.14.1, PINGRESP and DISCONNECT fixed headers must have remaining_length set to zero. The previous code dispatched to mqtt->nextstate based on the queued state alone without validating remaining_length for these no-payload packet types, allowing a malicious broker to send a PINGRESP with non-zero remaining_length whose trailing bytes would be interpreted as the payload of whatever message type was queued (CONNACK, SUBACK, etc.). The exploitation path turned out to be narrow — curl sends data to the server the user chose to talk to — but the spec violation and the resulting protocol-state error are real. Reject the malformed packets with CURLE_WEIRD_SERVER_REPLY before state dispatch. Reported-by: Raymond Steen <raymond@vortiqxconsilium.com> Found by VORTIQ-X VXF Framework Bug: https://hackerone.com/reports/3702718 Signed-off-by: Raymond Steen <raymond@vortiqxconsilium.com> Closes #21465 |
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| CMake | ||
| docs | ||
| include | ||
| lib | ||
| LICENSES | ||
| m4 | ||
| projects | ||
| scripts | ||
| src | ||
| tests | ||
| .clang-tidy.yml | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| acinclude.m4 | ||
| appveyor.sh | ||
| appveyor.yml | ||
| CHANGES.md | ||
| CMakeLists.txt | ||
| configure.ac | ||
| COPYING | ||
| curl-config.in | ||
| Dockerfile | ||
| GIT-INFO.md | ||
| libcurl.pc.in | ||
| Makefile.am | ||
| README | ||
| README.md | ||
| RELEASE-NOTES | ||
| renovate.json | ||
| REUSE.toml | ||
| SECURITY.md | ||
curl is a command-line tool for transferring data from or to a server using URLs. It supports these protocols: DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS.
Learn how to use curl by reading the man page or everything curl.
Find out how to install curl by reading the INSTALL document.
libcurl is the library curl is using to do its job. It is readily available to be used by your software. Read the libcurl man page to learn how.
Open Source
curl is Open Source and is distributed under an MIT-like license.
Contact
Contact us on a suitable mailing list or use GitHub issues/ pull requests/ discussions.
All contributors to the project are listed in the THANKS document.
Commercial support
For commercial support, maybe private and dedicated help with your problems or applications using (lib)curl visit the support page.
Website
Visit the curl website for the latest news and downloads.
Source code
Download the latest source from the Git server:
git clone https://github.com/curl/curl
Security problems
Report suspected security problems privately and not in public.
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