Описание
The BEGIN regular expression in the awk script detector in magic/Magdir/commands in file before 5.15 uses multiple wildcards with unlimited repetitions, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted ASCII file that triggers a large amount of backtracking, as demonstrated via a file with many newline characters.
Пакеты
| Пакет | Статус | Версия исправления | Релиз | Тип |
|---|---|---|---|---|
| file | fixed | 1:5.17-0.1 | package | |
| php5 | fixed | 5.6.0+dfsg-1 | package | |
| php5 | not-affected | squeeze | package |
Примечания
http://bugs.gw.com/view.php?id=164
fixed in commit ef2329cf71acb59204dd981e2c6cce6c81fe467c
Wheezy's php5 is vulnerable in 5.4.4-14+deb7u14. Verified by rebuilding
magic.mgc out of ext/fileinfo/data_info.c and "strings magic.mgc |grep BEGIN"
returns "^\s*BEGIN\s*[{]". Same test in squeeze does not
report the problematic string.
Good fix is to regenerate the file with "php5
create_data_file.php /usr/share/file/magic.mgc > data_info.c" once
you have a fixed libmagic1 installed.
fixed by php5 5.4.27 so DSA 3064-1 also fixed it in Wheezy
EPSS
Связанные уязвимости
The BEGIN regular expression in the awk script detector in magic/Magdir/commands in file before 5.15 uses multiple wildcards with unlimited repetitions, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted ASCII file that triggers a large amount of backtracking, as demonstrated via a file with many newline characters.
The BEGIN regular expression in the awk script detector in magic/Magdir/commands in file before 5.15 uses multiple wildcards with unlimited repetitions, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted ASCII file that triggers a large amount of backtracking, as demonstrated via a file with many newline characters.
The BEGIN regular expression in the awk script detector in magic/Magdir/commands in file before 5.15 uses multiple wildcards with unlimited repetitions, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted ASCII file that triggers a large amount of backtracking, as demonstrated via a file with many newline characters.
The BEGIN regular expression in the awk script detector in magic/Magdir/commands in file before 5.15 uses multiple wildcards with unlimited repetitions, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted ASCII file that triggers a large amount of backtracking, as demonstrated via a file with many newline characters.
Уязвимость операционной системы Gentoo Linux, позволяющая удаленному злоумышленнику нарушить доступность защищаемой информации
EPSS