Skip to navigation

Security Advisory Low: sudo security and bug fix update

Advisory: RHSA-2012:0309-3
Type: Security Advisory
Severity: Low
Issued on: 2012-02-21
Last updated on: 2012-02-21
Affected Products: Red Hat Enterprise Linux (v. 5 server)
Red Hat Enterprise Linux Desktop (v. 5 client)
CVEs (cve.mitre.org): CVE-2011-0010

Details

An updated sudo package that fixes one security issue and various bugs is
now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

The sudo (superuser do) utility allows system administrators to give
certain users the ability to run commands as root.

A flaw was found in the sudo password checking logic. In configurations
where the sudoers settings allowed a user to run a command using sudo
with only the group ID changed, sudo failed to prompt for the user's
password before running the specified command with the elevated group
privileges. (CVE-2011-0010)

In addition, this update fixes the following bugs:

* A NULL pointer dereference bug caused the sudo utility to terminate
unexpectedly with a segmentation fault. This happened if the utility was
run with the -g option and configured not to demand the password from the
user who ran the sudo utility. With this update, the code has been modified
and the problem no longer occurs. (BZ#673072)

* The sudo utility failed to load sudoers from an LDAP (Lightweight
Directory Access Protocol) server after the sudo tool was upgraded. This
happened because the upgraded nsswitch.conf file did not contain the
instruction to search for sudoers on the LDAP server. This update adds the
lost instruction to /etc/nsswitch.conf and the system searches for sources
of sudoers on the local file system and then on LDAP, if applicable.
(BZ#617061)

* The sudo tool interpreted a Runas alias specifying a group incorrectly as
a user alias and the alias seemed to be ignored. With this update, the code
for interpreting such aliases has been modified and the Runas group aliases
are honored as expected. (BZ#627543)

* Prior to this update, sudo did not parse comment characters (#) in the
ldap.conf file correctly and could fail to work. With this update, parsing
of the LDAP configuration file has been modified and the comment characters
are parsed correctly. (BZ#750318)

* The sudo utility formats its output to fit the width of the terminal
window. However, this behavior is undesirable if the output is redirected
through a pipeline. With this update, the output formatting is not applied
in the scenario described. (BZ#697111)

* Previously, the sudo utility performed Security-Enhanced Linux (SELinux)
related initialization after switching to an unprivileged user. This
prevented the correct setup of the SELinux environment before executing the
specified command and could potentially cause an access denial. The bug has
been fixed by backporting the SELinux related code and the execution model
from a newer version of sudo. (BZ#477185)

* On execv(3) function failure, the sudo tool executed an auditing call
before reporting the failure. The call reset the error state and,
consequently, the tool incorrectly reported that the command succeeded.
With this update, the code has been modified and the problem no longer
occurs. (BZ#673157)

All users of sudo are advised to upgrade to this updated package, which
resolves these issues.


Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Updated packages

Red Hat Enterprise Linux (v. 5 server)

SRPMS:
sudo-1.7.2p1-13.el5.src.rpm
File outdated by:  RHSA-2014:0266
    MD5: 2a0c103edcb3b9f04896bb109b2dd62f
SHA-256: 8591b9bf8b0729c142401f9e00e879978046107a855a46793e583fc906b19267
 
IA-32:
sudo-1.7.2p1-13.el5.i386.rpm
File outdated by:  RHSA-2014:0266
    MD5: 28267143426134f45e19c39625ba9465
SHA-256: a3f6461ac16d15b2348304408c75a3240bcdb8f029f85207b63ec8c15ed70484
sudo-debuginfo-1.7.2p1-13.el5.i386.rpm
File outdated by:  RHSA-2014:0266
    MD5: 2e969659317f549bc070d5ee4d64ad20
SHA-256: 2effc074b2bf1d0761daf015d8f8a0ad26fad06bf39f5268ed28b3e10dbedb36
 
IA-64:
sudo-1.7.2p1-13.el5.ia64.rpm
File outdated by:  RHSA-2014:0266
    MD5: e86cfdceaed7968ed92ba40b754f9b57
SHA-256: a5f87f6ef03873b2d7135e78198a5d2ac9722946a1a298b2c61b420fc2ce4eee
sudo-debuginfo-1.7.2p1-13.el5.ia64.rpm
File outdated by:  RHSA-2014:0266
    MD5: da961067c5eed6e295003d1ef18664a5
SHA-256: 4025818f7df289557214dfe6525c7af369d116057c21a8f89b8615037fb82dd7
 
PPC:
sudo-1.7.2p1-13.el5.ppc.rpm
File outdated by:  RHSA-2014:0266
    MD5: 91a4d5b1546e3485d9aabd1619feaf7b
SHA-256: 51079730bba1d2d60b6519f1d2f033786da1af50fdd25aab7253684cd555b5f0
sudo-debuginfo-1.7.2p1-13.el5.ppc.rpm
File outdated by:  RHSA-2014:0266
    MD5: 8b8507bf3d697cc12fe53ad063c4a8d3
SHA-256: a73c32ab55e2038220ea1a567fa9a8dfba34689ebbbce2833a097a67447b5f98
 
s390x:
sudo-1.7.2p1-13.el5.s390x.rpm
File outdated by:  RHSA-2014:0266
    MD5: b711a5810007d2fa93f16cad892cace4
SHA-256: 476bfbb0e942135ef27e4e568274f62fb7a7bcd135839468898c0c07615f1d2a
sudo-debuginfo-1.7.2p1-13.el5.s390x.rpm
File outdated by:  RHSA-2014:0266
    MD5: 1317df5155d9ba411299f7534d9b2671
SHA-256: 4962a2860a8c888d47fcc471bd6433b6af215eacc371dce15fb0ee47f5ba817e
 
x86_64:
sudo-1.7.2p1-13.el5.x86_64.rpm
File outdated by:  RHSA-2014:0266
    MD5: 33ac5ae8ead19d46020f9f40199eea7b
SHA-256: 390fd1aeb84db50a408acc87220c3eec5049c7731f7c0974d077b7a2ab63411e
sudo-debuginfo-1.7.2p1-13.el5.x86_64.rpm
File outdated by:  RHSA-2014:0266
    MD5: 6e71d8f879a7fa6249f497c7985e9b44
SHA-256: 43e811c88d6a1d96365f4e6ab935fcd1d1a8a36f489c2424b29db228ce608e76
 
Red Hat Enterprise Linux Desktop (v. 5 client)

SRPMS:
sudo-1.7.2p1-13.el5.src.rpm
File outdated by:  RHSA-2014:0266
    MD5: 2a0c103edcb3b9f04896bb109b2dd62f
SHA-256: 8591b9bf8b0729c142401f9e00e879978046107a855a46793e583fc906b19267
 
IA-32:
sudo-1.7.2p1-13.el5.i386.rpm
File outdated by:  RHSA-2014:0266
    MD5: 28267143426134f45e19c39625ba9465
SHA-256: a3f6461ac16d15b2348304408c75a3240bcdb8f029f85207b63ec8c15ed70484
sudo-debuginfo-1.7.2p1-13.el5.i386.rpm
File outdated by:  RHSA-2014:0266
    MD5: 2e969659317f549bc070d5ee4d64ad20
SHA-256: 2effc074b2bf1d0761daf015d8f8a0ad26fad06bf39f5268ed28b3e10dbedb36
 
x86_64:
sudo-1.7.2p1-13.el5.x86_64.rpm
File outdated by:  RHSA-2014:0266
    MD5: 33ac5ae8ead19d46020f9f40199eea7b
SHA-256: 390fd1aeb84db50a408acc87220c3eec5049c7731f7c0974d077b7a2ab63411e
sudo-debuginfo-1.7.2p1-13.el5.x86_64.rpm
File outdated by:  RHSA-2014:0266
    MD5: 6e71d8f879a7fa6249f497c7985e9b44
SHA-256: 43e811c88d6a1d96365f4e6ab935fcd1d1a8a36f489c2424b29db228ce608e76
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

477185 - sudo changes uid before calling SELInux calls, preventing it from setting terminal context when using non priv account
627543 - The Runas_Spec are ignored in sudoers file
668879 - CVE-2011-0010 sudo: does not ask for password on GID changes
673072 - sudo segfault
673157 - sudo fails to report error correctly when execv(3) fails
697111 - sudo -l inserts new lines based on terminal width, causing errors when output is piped.


References



These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/