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fix directory traversal issues in miniunzip 

bug-debian: https://bugs.debian.org/774321
bug-debian: https://bugs.debian.org/776831

Gbp-Pq: Name traversal.patch
This commit is contained in:
Michael Gilbert 2022-05-14 03:40:09 +08:00 committed by openKylinBot
parent cb8c4f3a8e
commit bb6b6080f5
1 changed files with 14 additions and 0 deletions
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14
miniunz.c
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@ -355,6 +355,20 @@ int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
else
write_filename = filename_withoutpath;
if (write_filename[0]!='\0')
{
const char* relative_check = write_filename;
while (relative_check[1]!='\0')
{
if (relative_check[0]=='.' && relative_check[1]=='.')
write_filename = relative_check;
relative_check++;
}
}
while (write_filename[0]=='/' || write_filename[0]=='.')
write_filename++;
err = unzOpenCurrentFilePassword(uf,password);
if (err!=UNZ_OK)
{