Headline
RHSA-2023:0281: Red Hat Security Advisory: sudo security update
An update for sudo is now available for Red Hat Enterprise Linux 9.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
Related CVEs:
- CVE-2023-22809: sudo: arbitrary file write with privileges of the RunAs user
Synopsis
Important: sudo security update
Type/Severity
Security Advisory: Important
Red Hat Insights patch analysis
Identify and remediate systems affected by this advisory.
View affected systems
Topic
An update for sudo is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root.
Security Fix(es):
- sudo: arbitrary file write with privileges of the RunAs user (CVE-2023-22809)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Products
- Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.0 x86_64
- Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.0 s390x
- Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.0 ppc64le
- Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.0 aarch64
- Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.0 ppc64le
- Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.0 x86_64
- Red Hat Enterprise Linux Server for ARM 64 - 4 years of updates 9.0 aarch64
- Red Hat Enterprise Linux Server for IBM z Systems - 4 years of updates 9.0 s390x
Fixes
- BZ - 2161142 - CVE-2023-22809 sudo: arbitrary file write with privileges of the RunAs user
Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.0
SRPM
sudo-1.9.5p2-7.el9_0.2.src.rpm
SHA-256: 26528a9cbb92342ec2dd1d003d85e9f91ec6f2bc1c3b485dad650d740cc4e477
x86_64
sudo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: ef5a163f4ad1c6a4915ebdb292d085ab6c8aa3f2af1ada0a0c03a58b12a6442f
sudo-debuginfo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 63287216cb945870d0cfad1d41eb4462fcdd52fb5dc14e11be22fbdbea6da1f4
sudo-debuginfo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 63287216cb945870d0cfad1d41eb4462fcdd52fb5dc14e11be22fbdbea6da1f4
sudo-debugsource-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 501596f973ce4a5734a65dbb59719f5807579250b4bf5217cda5800bcfffa06f
sudo-debugsource-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 501596f973ce4a5734a65dbb59719f5807579250b4bf5217cda5800bcfffa06f
sudo-python-plugin-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 1f863c71bfbe5fa7fe721fbab59623ac5f457cdd91191e01de3cb6ddf8f84fd5
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 1f6e1ffb3e31aff8c183a24dba60ad1458428a472e3db0bad24f287f0a57a9d0
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 1f6e1ffb3e31aff8c183a24dba60ad1458428a472e3db0bad24f287f0a57a9d0
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.0
SRPM
sudo-1.9.5p2-7.el9_0.2.src.rpm
SHA-256: 26528a9cbb92342ec2dd1d003d85e9f91ec6f2bc1c3b485dad650d740cc4e477
s390x
sudo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 3d1c0b3708c0033421b522ce72d567bbaa6608c8eb1d140383d8d708e7dd3f67
sudo-debuginfo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 307cee22ae27775bd16e42548e2780b9edf60b45a5bb68938c59da689e7f20de
sudo-debuginfo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 307cee22ae27775bd16e42548e2780b9edf60b45a5bb68938c59da689e7f20de
sudo-debugsource-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: e7a0f06aa38c71bdd8beed87c3c37b6f67a088359a8b36c166fd0445b9eacf19
sudo-debugsource-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: e7a0f06aa38c71bdd8beed87c3c37b6f67a088359a8b36c166fd0445b9eacf19
sudo-python-plugin-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 25d6ce6ccdd4818d83f71b6ab36f3f9ca73160f4b1039f5aa6a7e803ac056c26
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 9a4748418d5dcb21dd43b60d53255c7c4a2784f886c5f5ad026fa8cd273dc666
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 9a4748418d5dcb21dd43b60d53255c7c4a2784f886c5f5ad026fa8cd273dc666
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.0
SRPM
sudo-1.9.5p2-7.el9_0.2.src.rpm
SHA-256: 26528a9cbb92342ec2dd1d003d85e9f91ec6f2bc1c3b485dad650d740cc4e477
ppc64le
sudo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: 4c355929259bc933e8e5d397db2485467bf064396cce5ce4aca1d95f54afc6e2
sudo-debuginfo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: b9ebe503de2694e342087e26e1cde488dfb1289ba97d0529462638f67819f740
sudo-debuginfo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: b9ebe503de2694e342087e26e1cde488dfb1289ba97d0529462638f67819f740
sudo-debugsource-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: 6f25ef491d08de6567b20e871c242e1c3b03d58c5aa06e54317d6288da878ea4
sudo-debugsource-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: 6f25ef491d08de6567b20e871c242e1c3b03d58c5aa06e54317d6288da878ea4
sudo-python-plugin-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: 27c8f1b5e45e5232e9cd9a486ca7e11027578d3a81f445994d7c72dcf670b76f
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: b15195f61baf18bbff2c116c7c2ae3cc80c9c474888b460514649cadff8f512e
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: b15195f61baf18bbff2c116c7c2ae3cc80c9c474888b460514649cadff8f512e
Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.0
SRPM
sudo-1.9.5p2-7.el9_0.2.src.rpm
SHA-256: 26528a9cbb92342ec2dd1d003d85e9f91ec6f2bc1c3b485dad650d740cc4e477
aarch64
sudo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 1aa895baaeadf04d8281bc71105bbb2d9c189a65d1436f7547c86f8fcc7ef84e
sudo-debuginfo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 5840d4c6a5d4f118543164e8108eca7a4544f16baded7323ab91c71678058e4c
sudo-debuginfo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 5840d4c6a5d4f118543164e8108eca7a4544f16baded7323ab91c71678058e4c
sudo-debugsource-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 2bc918b1904ee8fabeb585c3c95d5a7bca0c8d468e6a75dacc6e3d8c2e9d97ac
sudo-debugsource-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 2bc918b1904ee8fabeb585c3c95d5a7bca0c8d468e6a75dacc6e3d8c2e9d97ac
sudo-python-plugin-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 4ead54c3b7e5eacfbe2c3f5c35c6dacf3e6618146ebf9e6d9926d7940c50720b
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: b7db99629f987303189d52f3bea7fc2374d0d3f862f41afbbf3d0692bb7bf9df
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: b7db99629f987303189d52f3bea7fc2374d0d3f862f41afbbf3d0692bb7bf9df
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.0
SRPM
sudo-1.9.5p2-7.el9_0.2.src.rpm
SHA-256: 26528a9cbb92342ec2dd1d003d85e9f91ec6f2bc1c3b485dad650d740cc4e477
ppc64le
sudo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: 4c355929259bc933e8e5d397db2485467bf064396cce5ce4aca1d95f54afc6e2
sudo-debuginfo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: b9ebe503de2694e342087e26e1cde488dfb1289ba97d0529462638f67819f740
sudo-debuginfo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: b9ebe503de2694e342087e26e1cde488dfb1289ba97d0529462638f67819f740
sudo-debugsource-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: 6f25ef491d08de6567b20e871c242e1c3b03d58c5aa06e54317d6288da878ea4
sudo-debugsource-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: 6f25ef491d08de6567b20e871c242e1c3b03d58c5aa06e54317d6288da878ea4
sudo-python-plugin-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: 27c8f1b5e45e5232e9cd9a486ca7e11027578d3a81f445994d7c72dcf670b76f
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: b15195f61baf18bbff2c116c7c2ae3cc80c9c474888b460514649cadff8f512e
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.ppc64le.rpm
SHA-256: b15195f61baf18bbff2c116c7c2ae3cc80c9c474888b460514649cadff8f512e
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.0
SRPM
sudo-1.9.5p2-7.el9_0.2.src.rpm
SHA-256: 26528a9cbb92342ec2dd1d003d85e9f91ec6f2bc1c3b485dad650d740cc4e477
x86_64
sudo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: ef5a163f4ad1c6a4915ebdb292d085ab6c8aa3f2af1ada0a0c03a58b12a6442f
sudo-debuginfo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 63287216cb945870d0cfad1d41eb4462fcdd52fb5dc14e11be22fbdbea6da1f4
sudo-debuginfo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 63287216cb945870d0cfad1d41eb4462fcdd52fb5dc14e11be22fbdbea6da1f4
sudo-debugsource-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 501596f973ce4a5734a65dbb59719f5807579250b4bf5217cda5800bcfffa06f
sudo-debugsource-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 501596f973ce4a5734a65dbb59719f5807579250b4bf5217cda5800bcfffa06f
sudo-python-plugin-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 1f863c71bfbe5fa7fe721fbab59623ac5f457cdd91191e01de3cb6ddf8f84fd5
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 1f6e1ffb3e31aff8c183a24dba60ad1458428a472e3db0bad24f287f0a57a9d0
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.x86_64.rpm
SHA-256: 1f6e1ffb3e31aff8c183a24dba60ad1458428a472e3db0bad24f287f0a57a9d0
Red Hat Enterprise Linux Server for ARM 64 - 4 years of updates 9.0
SRPM
sudo-1.9.5p2-7.el9_0.2.src.rpm
SHA-256: 26528a9cbb92342ec2dd1d003d85e9f91ec6f2bc1c3b485dad650d740cc4e477
aarch64
sudo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 1aa895baaeadf04d8281bc71105bbb2d9c189a65d1436f7547c86f8fcc7ef84e
sudo-debuginfo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 5840d4c6a5d4f118543164e8108eca7a4544f16baded7323ab91c71678058e4c
sudo-debuginfo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 5840d4c6a5d4f118543164e8108eca7a4544f16baded7323ab91c71678058e4c
sudo-debugsource-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 2bc918b1904ee8fabeb585c3c95d5a7bca0c8d468e6a75dacc6e3d8c2e9d97ac
sudo-debugsource-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 2bc918b1904ee8fabeb585c3c95d5a7bca0c8d468e6a75dacc6e3d8c2e9d97ac
sudo-python-plugin-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: 4ead54c3b7e5eacfbe2c3f5c35c6dacf3e6618146ebf9e6d9926d7940c50720b
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: b7db99629f987303189d52f3bea7fc2374d0d3f862f41afbbf3d0692bb7bf9df
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.aarch64.rpm
SHA-256: b7db99629f987303189d52f3bea7fc2374d0d3f862f41afbbf3d0692bb7bf9df
Red Hat Enterprise Linux Server for IBM z Systems - 4 years of updates 9.0
SRPM
sudo-1.9.5p2-7.el9_0.2.src.rpm
SHA-256: 26528a9cbb92342ec2dd1d003d85e9f91ec6f2bc1c3b485dad650d740cc4e477
s390x
sudo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 3d1c0b3708c0033421b522ce72d567bbaa6608c8eb1d140383d8d708e7dd3f67
sudo-debuginfo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 307cee22ae27775bd16e42548e2780b9edf60b45a5bb68938c59da689e7f20de
sudo-debuginfo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 307cee22ae27775bd16e42548e2780b9edf60b45a5bb68938c59da689e7f20de
sudo-debugsource-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: e7a0f06aa38c71bdd8beed87c3c37b6f67a088359a8b36c166fd0445b9eacf19
sudo-debugsource-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: e7a0f06aa38c71bdd8beed87c3c37b6f67a088359a8b36c166fd0445b9eacf19
sudo-python-plugin-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 25d6ce6ccdd4818d83f71b6ab36f3f9ca73160f4b1039f5aa6a7e803ac056c26
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 9a4748418d5dcb21dd43b60d53255c7c4a2784f886c5f5ad026fa8cd273dc666
sudo-python-plugin-debuginfo-1.9.5p2-7.el9_0.2.s390x.rpm
SHA-256: 9a4748418d5dcb21dd43b60d53255c7c4a2784f886c5f5ad026fa8cd273dc666
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This exploit takes advantage of a vulnerability in sudoedit, part of the sudo package. The sudoedit (aka sudo -e) feature mishandles extra arguments passed in the user-provided environment variables (SUDO_EDITOR, VISUAL, and EDITOR), allowing a local attacker to append arbitrary entries to the list of files to process. This can lead to privilege escalation. by appending extra entries on /etc/sudoers allowing for execution of an arbitrary payload with root privileges. Affected versions are 1.8.0 through 1.9.12.p1. However, this module only works against Ubuntu 22.04 and 22.10. This module was tested against sudo 1.9.9-1ubuntu2 on Ubuntu 22.04 and 1.9.11p3-1ubuntu1 on Ubuntu 22.10.
An update for sudo is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2023-22809: A vulnerability was found in sudo. Exposure in how sudoedit handles user-provided environment variables leads to arbitrary file writing with privileges of the RunAs user (usually root). The prerequisite for exploitation is that the current user must be authorized by the sudoers policy to edit a file using sudoedit.
Gentoo Linux Security Advisory 202305-12 - A vulnerability has been discovered in sudo which could result in root privilege escalation. Versions less than 1.9.12_p2 are affected.
sudo versions 1.8.0 through 1.9.12p1 local privilege escalation exploit.
Red Hat Security Advisory 2023-0859-01 - The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. The ovirt-node-ng packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Issues addressed include code execution and integer overflow vulnerabilities.
Ubuntu Security Notice 5811-3 - USN-5811-1 fixed a vulnerability in Sudo. This update provides the corresponding update for Ubuntu 14.04 ESM. Matthieu Barjole and Victor Cutillas discovered that Sudo incorrectly handled user-specified editors when using the sudoedit command. A local attacker that has permission to use the sudoedit command could possibly use this issue to edit arbitrary files.
Red Hat Security Advisory 2023-0291-01 - The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root.
Red Hat Security Advisory 2023-0281-01 - The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root.
Red Hat Security Advisory 2023-0280-01 - The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root.
Red Hat Security Advisory 2023-0282-01 - The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root.
An update for sudo is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2023-22809: sudo: arbitrary file write with privileges of the RunAs user
An update for sudo is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2023-22809: sudo: arbitrary file write with privileges of the RunAs user
An update for sudo is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2023-22809: sudo: arbitrary file write with privileges of the RunAs user
An update for sudo is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2023-22809: sudo: arbitrary file write with privileges of the RunAs user
Ubuntu Security Notice 5811-2 - USN-5811-1 fixed a vulnerability in Sudo. This update provides the corresponding update for Ubuntu 16.04 ESM. Matthieu Barjole and Victor Cutillas discovered that Sudo incorrectly handled user-specified editors when using the sudoedit command. A local attacker that has permission to use the sudoedit command could possibly use this issue to edit arbitrary files.
Debian Linux Security Advisory 5321-1 - Matthieu Barjole and Victor Cutillas discovered that sudoedit in sudo, a program designed to provide limited super user privileges to specific users, does not properly handle '--' to separate the editor and arguments from files to edit. A local user permitted to edit certain files can take advantage of this flaw to edit a file not permitted by the security policy, resulting in privilege escalation.
In Sudo before 1.9.12p2, the sudoedit (aka -e) feature mishandles extra arguments passed in the user-provided environment variables (SUDO_EDITOR, VISUAL, and EDITOR), allowing a local attacker to append arbitrary entries to the list of files to process. This can lead to privilege escalation. Affected versions are 1.8.0 through 1.9.12.p1. The problem exists because a user-specified editor may contain a "--" argument that defeats a protection mechanism, e.g., an EDITOR='vim -- /path/to/extra/file' value.