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CVE-2011-4116

Publication date 31 January 2020

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

_is_safe in the File::Temp module for Perl does not properly handle symlinks.

Read the notes from the security team

Status

Package Ubuntu Release Status
libfile-temp-perl 12.10 quantal Not in release
12.04 LTS precise Not in release
11.10 oneiric Ignored
11.04 natty Ignored
10.10 maverick Ignored
10.04 LTS lucid Ignored
8.04 LTS hardy Ignored
perl 12.10 quantal Ignored
12.04 LTS precise Ignored
11.10 oneiric Ignored
11.04 natty Ignored
10.10 maverick Ignored
10.04 LTS lucid Ignored
8.04 LTS hardy Ignored

Notes

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.

Severity score breakdown

Parameter Value
Base score 7.5 · High
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