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curl: improve the existing file check with -J

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Previously a file that isn't user-readable but is user-writable would
not be properly avoided and would get overwritten.

Reported-by: BrumBrum on hackerone
Assisted-by: Jay Satiro
Bug: https://hackerone.com/reports/926638
Closes #5731
This commit is contained in:
Daniel Stenberg 2020-07-27 12:44:19 +02:00
parent 2b6b843bb1
commit 81b4e99b1e
No known key found for this signature in database
GPG key ID: 5CC908FDB71E12C2
3 changed files with 36 additions and 10 deletions
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10
lib/memdebug.c
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@ -456,6 +456,16 @@ FILE *curl_dbg_fopen(const char *file, const char *mode,
return res;
}
FILE *curl_dbg_fdopen(int filedes, const char *mode,
int line, const char *source)
{
FILE *res = fdopen(filedes, mode);
if(source)
curl_dbg_log("FILE %s:%d fdopen(\"%d\",\"%s\") = %p\n",
source, line, filedes, mode, (void *)res);
return res;
}
int curl_dbg_fclose(FILE *file, int line, const char *source)
{
int res;