| 1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 2 |
Gentoo Linux Security Advisory GLSA 201706-01 |
| 3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 4 |
https://security.gentoo.org/ |
| 5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 6 |
|
| 7 |
Severity: High |
| 8 |
Title: MUNGE: Privilege escalation |
| 9 |
Date: June 06, 2017 |
| 10 |
Bugs: #602596 |
| 11 |
ID: 201706-01 |
| 12 |
|
| 13 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 14 |
|
| 15 |
Synopsis |
| 16 |
======== |
| 17 |
|
| 18 |
Gentoo's MUNGE ebuilds are vulnerable to privilege escalation due to |
| 19 |
improper permissions. |
| 20 |
|
| 21 |
Background |
| 22 |
========== |
| 23 |
|
| 24 |
An authentication service for creating and validating credentials. |
| 25 |
|
| 26 |
Affected packages |
| 27 |
================= |
| 28 |
|
| 29 |
------------------------------------------------------------------- |
| 30 |
Package / Vulnerable / Unaffected |
| 31 |
------------------------------------------------------------------- |
| 32 |
1 sys-auth/munge < 0.5.10-r2 >= 0.5.10-r2 |
| 33 |
|
| 34 |
Description |
| 35 |
=========== |
| 36 |
|
| 37 |
It was discovered that Gentoo's default MUNGE installation suffered |
| 38 |
from a privilege escalation vulnerability (munge user to root) due to |
| 39 |
improper permissions and a runscript which called chown() on a user |
| 40 |
controlled file. |
| 41 |
|
| 42 |
Impact |
| 43 |
====== |
| 44 |
|
| 45 |
A local attacker, who either is already MUNGE's system user or belongs |
| 46 |
to MUNGE's group, could potentially escalate privileges. |
| 47 |
|
| 48 |
Workaround |
| 49 |
========== |
| 50 |
|
| 51 |
There is no known workaround at this time. |
| 52 |
|
| 53 |
Resolution |
| 54 |
========== |
| 55 |
|
| 56 |
All MUNGE users should upgrade to the latest version: |
| 57 |
|
| 58 |
# emerge --sync |
| 59 |
# emerge --ask --oneshot --verbose ">=sys-auth/munge-0.5.10-r2" |
| 60 |
|
| 61 |
References |
| 62 |
========== |
| 63 |
|
| 64 |
|
| 65 |
Availability |
| 66 |
============ |
| 67 |
|
| 68 |
This GLSA and any updates to it are available for viewing at |
| 69 |
the Gentoo Security Website: |
| 70 |
|
| 71 |
https://security.gentoo.org/glsa/201706-01 |
| 72 |
|
| 73 |
Concerns? |
| 74 |
========= |
| 75 |
|
| 76 |
Security is a primary focus of Gentoo Linux and ensuring the |
| 77 |
confidentiality and security of our users' machines is of utmost |
| 78 |
importance to us. Any security concerns should be addressed to |
| 79 |
security@g.o or alternatively, you may file a bug at |
| 80 |
https://bugs.gentoo.org. |
| 81 |
|
| 82 |
License |
| 83 |
======= |
| 84 |
|
| 85 |
Copyright 2017 Gentoo Foundation, Inc; referenced text |
| 86 |
belongs to its owner(s). |
| 87 |
|
| 88 |
The contents of this document are licensed under the |
| 89 |
Creative Commons - Attribution / Share Alike license. |
| 90 |
|
| 91 |
http://creativecommons.org/licenses/by-sa/2.5 |
Archives