CVE-2011-4116
Published: 31 January 2020
_is_safe in the File::Temp module for Perl does not properly handle symlinks.
Notes
Author | Note |
---|---|
seth-arnold | No agreed-upon or released patch exists for _is_safe(). Solar Designer questions the _is_safe() MEDIUM and HIGH checks altogether; attempted patches to check the safety of parent directories forbid /tmp symlinks. It is probably impossible to make _is_safe() secure. Ubuntu symlink and hardlink restrictions should prevent this entire class of problems. |
Priority
Status
Package | Release | Status |
---|---|---|
perl Launchpad, Ubuntu, Debian |
hardy |
Ignored
|
lucid |
Ignored
|
|
maverick |
Ignored
(end of life)
|
|
natty |
Ignored
(end of life)
|
|
oneiric |
Ignored
|
|
precise |
Ignored
|
|
quantal |
Ignored
|
|
upstream |
Ignored
|
|
This vulnerability is mitigated in part by the use of hardlink restrictions in Ubuntu. This vulnerability is mitigated in part by the use of symlink restrictions in Ubuntu. | ||
libfile-temp-perl Launchpad, Ubuntu, Debian |
hardy |
Ignored
(end of life)
|
lucid |
Ignored
|
|
maverick |
Ignored
(end of life)
|
|
natty |
Ignored
(end of life)
|
|
oneiric |
Ignored
|
|
precise |
Does not exist
|
|
quantal |
Does not exist
|
|
upstream |
Ignored
|
|
This vulnerability is mitigated in part by the use of hardlink restrictions in Ubuntu. This vulnerability is mitigated in part by the use of symlink restrictions in Ubuntu. |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |