Faiblesses connexes
CWE-ID |
Nom de la faiblesse |
Source |
CWE-264 |
Category : Permissions, Privileges, and Access Controls Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control. |
|
Métriques
Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
V2 |
7.2 |
|
AV:L/AC:L/Au:N/C:C/I:C/A:C |
nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 37710
Date de publication : 2015-07-27 22h00 +00:00
Auteur : daniel svartman
EDB Vérifié : Yes
# Exploit Title: sudo -e - a.k.a. sudoedit - unauthorized privilege escalation
# Date: 07-23-2015
# Exploit Author: Daniel Svartman
# Version: Sudo <=1.8.14
# Tested on: RHEL 5/6/7 and Ubuntu (all versions)
# CVE: CVE-2015-5602.
Hello,
I found a security bug in sudo (checked in the latest versions of sudo
running on RHEL and ubuntu) when a user is granted with root access to
modify a particular file that could be located in a subset of directories.
It seems that sudoedit does not check the full path if a wildcard is used
twice (e.g. /home/*/*/file.txt), allowing a malicious user to replace the
file.txt real file with a symbolic link to a different location (e.g.
/etc/shadow).
I was able to perform such redirect and retrieve the data from the
/etc/shadow file.
In order for you to replicate this, you should configure the following line
in your /etc/sudoers file:
<user_to_grant_priv> ALL=(root) NOPASSWD: sudoedit /home/*/*/test.txt
Then, logged as that user, create a subdirectory within its home folder
(e.g. /home/<user_to_grant_priv>/newdir) and later create a symbolic link
inside the new folder named test.txt pointing to /etc/shadow.
When you run sudoedit /home/<user_to_grant_priv>/newdir/test.txt you will
be allowed to access the /etc/shadow even if have not been granted with
such access in the sudoers file.
I checked this against fixed directories and files (not using a wildcard)
and it does work with symbolic links created under the /home folder.
Products Mentioned
Configuraton 0
Sudo_project>>Sudo >> Version To (including) 1.8.14
Références