| Ticket UUID: | 66da4d4228be65fea83fa7eb4f9e932b7951341d | |||
| Title: | Tcl_UtfToExternal buffer overwrite for non-BMP characters using utf-16 encoders | |||
| Type: | Bug | Version: | 9.0.0 | |
| Submitter: | apnadkarni | Created on: | 2024-10-19 15:51:30 | |
| Subsystem: | 44. UTF-8 Strings | Assigned To: | nobody | |
| Priority: | 5 Medium | Severity: | Severe | |
| Status: | Closed | Last Modified: | 2024-10-22 16:59:40 | |
| Resolution: | Fixed | Closed By: | apnadkarni | |
| Closed on: | 2024-10-22 16:59:40 | |||
| Description: |
(text/x-markdown)
UTF-16 encoders write beyond destination space when encoding non-BMP characters.
```
% set utf8 [binary decode hex 41f09f988042]; encoding convertfrom utf-8 $utf8
A😀B
% testencoding Tcl_UtfToExternal utf-16le $utf8 {start end} {} 7 nread nwritten nchars
Tcl_UtfToExternal wrote past output buffer
```
| |||
| User Comments: |
apnadkarni added on 2024-10-19 16:21:29:
(text/x-fossil-plain)
Proposed fix in [4574a1e8d3] | |||
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