ID

VAR-201304-0091

CVE

CVE-2013-1776

TITLE

sudo Vulnerabilities that are hijacked for authentication

DESCRIPTION

sudo 1.3.5 through 1.7.10 and 1.8.0 through 1.8.5, when the tty_tickets option is enabled, does not properly validate the controlling terminal device, which allows local users with sudo permissions to hijack the authorization of another terminal via vectors related to connecting to the standard input, output, and error file descriptors of another terminal. NOTE: this is one of three closely-related vulnerabilities that were originally assigned CVE-2013-1776, but they have been SPLIT because of different affected versions. The vulnerability was closely related 3 Of one vulnerability 1 And against them CVE-2013-1776 of 1 Was numbered, but the affected version is different 3 Divided into two.sudo An authorized local user may be able to hijack authentication on other terminals. Todd Miller 'sudo' is prone to a local security-bypass vulnerability. An attacker can exploit this issue to bypass certain security restrictions and perform unauthorized actions. This issue affects 'sudo' 1.3.5 through 1.7.10p5 and sudo 1.8.0 through 1.8.6p6. Note: An attacker requires the 'tty_tickets' option to enable in versions prior to sudo 1.7.4.. Sudo is a set of programs developed by software developer Todd C. Miller for Unix-like operating systems and allows users to execute commands with special privileges in a secure manner. Vulnerabilities exist in 'sudo' versions 1.3.5 to 1.7.10p6 and 1.8.0 to 1.8.6p7. Successful exploitation of this vulnerability requires the 'tty_tickets' option to be enabled. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201401-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: sudo: Privilege escalation Date: January 21, 2014 Bugs: #459722 ID: 201401-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in sudo which could result in privilege escalation. Access to commands may also be granted on a range to hosts. * sudo does not properly handle the clock when it is set to the epoch. Additionally, a local or physically proximate attacker could set the system clock to the epoch, bypassing time restrictions on sudo authentication. Workaround ========== There is no known workaround at this time. Resolution ========== All sudo users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.8.6_p7" References ========== [ 1 ] CVE-2013-1775 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-1775 [ 2 ] CVE-2013-1776 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-1776 [ 3 ] CVE-2013-2776 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2776 [ 4 ] CVE-2013-2777 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2777 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201401-23.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2014 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5 . The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2013-1775 Marco Schoepl discovered an authentication bypass when the clock is set to the UNIX epoch [00:00:00 UTC on 1 January 1970]. CVE-2013-1776 Ryan Castellucci and James Ogden discovered aspects of an issue that would allow session id hijacking from another authorized tty. For the stable distribution (squeeze), these problems have been fixed in version 1.7.4p4-2.squeeze.4. For the testing (wheezy) and unstable (sid) distributions, these problems have been fixed in version 1.8.5p2-1+nmu1. We recommend that you upgrade your sudo packages. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 _______________________________________________________________________ Mandriva Linux Security Advisory MDVSA-2013:054 http://www.mandriva.com/en/support/security/ _______________________________________________________________________ Package : sudo Date : April 5, 2013 Affected: Business Server 1.0 _______________________________________________________________________ Problem Description: Multiple vulnerabilities has been found and corrected in sudo: A flaw exists in the IP network matching code in sudo versions 1.6.9p3 through 1.8.4p4 that may result in the local host being matched even though it is not actually part of the network described by the IP address and associated netmask listed in the sudoers file or in LDAP. _______________________________________________________________________ References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2337 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1775 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1776 http://www.sudo.ws/sudo/alerts/netmask.html http://www.sudo.ws/sudo/alerts/epoch_ticket.html http://www.sudo.ws/sudo/alerts/tty_tickets.html _______________________________________________________________________ Updated Packages: Mandriva Business Server 1/X86_64: 19aae8be2f1e4cc9d8e188a2d8147e99 mbs1/x86_64/sudo-1.8.3p2-2.1.mbs1.x86_64.rpm 13e0fd85e811c76b8863fa6d12889636 mbs1/x86_64/sudo-devel-1.8.3p2-2.1.mbs1.x86_64.rpm 922d319a0f3c78d10c1ca7be22141821 mbs1/SRPMS/sudo-1.8.3p2-2.1.mbs1.src.rpm _______________________________________________________________________ To upgrade automatically use MandrivaUpdate or urpmi. The verification of md5 checksums and GPG signatures is performed automatically for you. All packages are signed by Mandriva for security. You can obtain the GPG public key of the Mandriva Security Team by executing: gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98 You can view other update advisories for Mandriva Linux at: http://www.mandriva.com/en/support/security/advisories/ If you want to report vulnerabilities, please contact security_(at)_mandriva.com _______________________________________________________________________ Type Bits/KeyID Date User ID pub 1024D/22458A98 2000-07-10 Mandriva Security Team <security*mandriva.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iD8DBQFRXtnVmqjQ0CJFipgRAsBMAKCsU59xkkVcM4GANchnsdRDG+8srwCgkUwJ DXL0KGekk1VjbuhT941o/J8= =mpB4 -----END PGP SIGNATURE----- . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: sudo security and bug fix update Advisory ID: RHSA-2013:1353-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1353.html Issue date: 2013-09-30 CVE Names: CVE-2013-1775 CVE-2013-1776 CVE-2013-2776 ===================================================================== 1. Summary: An updated sudo package that fixes multiple security issues and several 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. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 3. Description: 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 way sudo handled time stamp files. An attacker able to run code as a local user and with the ability to control the system clock could possibly gain additional privileges by running commands that the victim user was allowed to run via sudo, without knowing the victim's password. An attacker able to run code as a local user could possibly gain additional privileges by running commands that the victim user was allowed to run via sudo, without knowing the victim's password. (CVE-2013-1776, CVE-2013-2776) This update also fixes the following bugs: * Due to a bug in the cycle detection algorithm of the visudo utility, visudo incorrectly evaluated certain alias definitions in the /etc/sudoers file as cycles. Consequently, a warning message about undefined aliases appeared. This bug has been fixed, /etc/sudoers is now parsed correctly by visudo and the warning message no longer appears. (BZ#849679) * Previously, the 'sudo -l' command did not parse the /etc/sudoers file correctly if it contained an Active Directory (AD) group. The file was parsed only up to the first AD group information and then the parsing failed with the following message: sudo: unable to cache group ADDOM\admingroup, already exists With this update, the underlying code has been modified and 'sudo -l' now parses /etc/sudoers containing AD groups correctly. (BZ#855836) * Previously, the sudo utility did not escape the backslash characters contained in user names properly. Consequently, if a system used sudo integrated with LDAP or Active Directory (AD) as the primary authentication mechanism, users were not able to authenticate on that system. With this update, sudo has been modified to process LDAP and AD names correctly and the authentication process now works as expected. (BZ#869287) * Prior to this update, the 'visudo -s (strict)' command incorrectly parsed certain alias definitions. Consequently, an error message was issued. The bug has been fixed, and parsing errors no longer occur when using 'visudo - -s'. (BZ#905624) All sudo users are advised to upgrade to this updated package, which contains backported patches to correct these issues. 4. 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/site/articles/11258 5. Bugs fixed (http://bugzilla.redhat.com/): 853203 - Sudo -i isn't passing command arguments containing spaces properly as of sudo-1.7.2p1-14.el5_8.3 856902 - Defauts:!<user> syntax in sudoers doesn't seem to work as expected 916363 - CVE-2013-1775 sudo: authentication bypass via reset system clock 916365 - CVE-2013-1776 sudo: bypass of tty_tickets constraints 949751 - CVE-2013-2776 sudo: bypass of tty_tickets constraints 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/sudo-1.7.2p1-28.el5.src.rpm i386: sudo-1.7.2p1-28.el5.i386.rpm sudo-debuginfo-1.7.2p1-28.el5.i386.rpm x86_64: sudo-1.7.2p1-28.el5.x86_64.rpm sudo-debuginfo-1.7.2p1-28.el5.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/sudo-1.7.2p1-28.el5.src.rpm i386: sudo-1.7.2p1-28.el5.i386.rpm sudo-debuginfo-1.7.2p1-28.el5.i386.rpm ia64: sudo-1.7.2p1-28.el5.ia64.rpm sudo-debuginfo-1.7.2p1-28.el5.ia64.rpm ppc: sudo-1.7.2p1-28.el5.ppc.rpm sudo-debuginfo-1.7.2p1-28.el5.ppc.rpm s390x: sudo-1.7.2p1-28.el5.s390x.rpm sudo-debuginfo-1.7.2p1-28.el5.s390x.rpm x86_64: sudo-1.7.2p1-28.el5.x86_64.rpm sudo-debuginfo-1.7.2p1-28.el5.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2013-1775.html https://www.redhat.com/security/data/cve/CVE-2013-1776.html https://www.redhat.com/security/data/cve/CVE-2013-2776.html https://access.redhat.com/security/updates/classification/#low 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2013 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFSSguTXlSAg2UNWIIRAtwlAKCLKk70m9/uWyLEIm1+g318CaucUACfa0Rb YYD4VZy8KV2MT9Qt974bDHg= =BMck -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

permissions and access control

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Ryan Castellucci and James Ogden

SOURCES

LAST UPDATE DATE

2026-03-30T21:17:19.553000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE