Vulnerabilities > CVE-2016-0634 - OS Command Injection vulnerability in GNU Bash 4.3
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
SINGLE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
The expansion of '\h' in the prompt string in bash 4.3 allows remote authenticated users to execute arbitrary code via shell metacharacters placed in 'hostname' of a machine.
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
- Command Delimiters An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or a blacklist input validation, as opposed to whitelist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or blacklist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.
- Exploiting Multiple Input Interpretation Layers An attacker supplies the target software with input data that contains sequences of special characters designed to bypass input validation logic. This exploit relies on the target making multiples passes over the input data and processing a "layer" of special characters with each pass. In this manner, the attacker can disguise input that would otherwise be rejected as invalid by concealing it with layers of special/escape characters that are stripped off by subsequent processing steps. The goal is to first discover cases where the input validation layer executes before one or more parsing layers. That is, user input may go through the following logic in an application: In such cases, the attacker will need to provide input that will pass through the input validator, but after passing through parser2, will be converted into something that the input validator was supposed to stop.
- Argument Injection An attacker changes the behavior or state of a targeted application through injecting data or command syntax through the targets use of non-validated and non-filtered arguments of exposed services or methods.
- OS Command Injection In this type of an attack, an adversary injects operating system commands into existing application functions. An application that uses untrusted input to build command strings is vulnerable. An adversary can leverage OS command injection in an application to elevate privileges, execute arbitrary commands and compromise the underlying operating system.
Nessus
NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2017-0040.NASL description An update of [openjdk,openjre,bash,libtar,glibc,libgcrypt,strongswan,unzip] packages for PhotonOS has been released. last seen 2019-02-21 modified 2019-02-07 plugin id 111889 published 2018-08-17 reporter Tenable source https://www.tenable.com/plugins/index.php?view=single&id=111889 title Photon OS 1.0: Bash / Glibc / Libgcrypt / Libtar / Openjdk / Openjre / Strongswan / Unzip PHSA-2017-0040 (deprecated) code # # (C) Tenable Network Security, Inc. # # @DEPRECATED@ # # Disabled on 2/7/2019 # # The descriptive text and package checks in this plugin were # extracted from VMware Security Advisory PHSA-2017-0040. The text # itself is copyright (C) VMware, Inc. include("compat.inc"); if (description) { script_id(111889); script_version("1.3"); script_cvs_date("Date: 2019/04/05 23:25:07"); script_cve_id( "CVE-2013-4420", "CVE-2014-9844", "CVE-2014-9913", "CVE-2016-0634", "CVE-2016-9844", "CVE-2017-9526", "CVE-2017-10274", "CVE-2017-10285", "CVE-2017-10309", "CVE-2017-10346", "CVE-2017-10388", "CVE-2017-11185", "CVE-2017-12133" ); script_name(english:"Photon OS 1.0: Bash / Glibc / Libgcrypt / Libtar / Openjdk / Openjre / Strongswan / Unzip PHSA-2017-0040 (deprecated)"); script_summary(english:"Checks the rpm output for the updated packages."); script_set_attribute(attribute:"synopsis", value: "This plugin has been deprecated."); script_set_attribute(attribute:"description", value: "An update of [openjdk,openjre,bash,libtar,glibc,libgcrypt,strongswan,unzip] packages for PhotonOS has been released."); # https://github.com/vmware/photon/wiki/Security-Updates-80 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b0fdbe24"); script_set_attribute(attribute:"solution", value:"n/a."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-10285"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"patch_publication_date", value:"2017/10/24"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/17"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:bash"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:glibc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:libgcrypt"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:libtar"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:openjdk"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:openjre"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:strongswan"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:unzip"); script_set_attribute(attribute:"cpe", value:"cpe:/o:vmware:photonos:1.0"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"PhotonOS Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/PhotonOS/release", "Host/PhotonOS/rpm-list"); exit(0); } exit(0, "This plugin has been deprecated."); include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/PhotonOS/release"); if (isnull(release) || release !~ "^VMware Photon") audit(AUDIT_OS_NOT, "PhotonOS"); if (release !~ "^VMware Photon (?:Linux|OS) 1\.0(\D|$)") audit(AUDIT_OS_NOT, "PhotonOS 1.0"); if (!get_kb_item("Host/PhotonOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "PhotonOS", cpu); flag = 0; pkgs = [ "bash-4.3.48-1.ph1", "bash-debuginfo-4.3.48-1.ph1", "bash-lang-4.3.48-1.ph1", "glibc-2.22-14.ph1", "glibc-devel-2.22-14.ph1", "glibc-lang-2.22-14.ph1", "libgcrypt-1.7.6-3.ph1", "libgcrypt-debuginfo-1.7.6-3.ph1", "libgcrypt-devel-1.7.6-3.ph1", "libtar-1.2.20-3.ph1", "libtar-devel-1.2.20-3.ph1", "openjdk-1.8.0.151-1.ph1", "openjdk-debuginfo-1.8.0.151-1.ph1", "openjdk-doc-1.8.0.151-1.ph1", "openjdk-sample-1.8.0.151-1.ph1", "openjdk-src-1.8.0.151-1.ph1", "openjre-1.8.0.151-1.ph1", "strongswan-5.5.1-2.ph1", "strongswan-debuginfo-5.5.1-2.ph1", "unzip-6.0-8.ph1" ]; foreach (pkg in pkgs) if (rpm_check(release:"PhotonOS-1.0", reference:pkg)) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_WARNING, extra : rpm_report_get() ); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "bash / glibc / libgcrypt / libtar / openjdk / openjre / strongswan / unzip"); }NASL family Slackware Local Security Checks NASL id SLACKWARE_SSA_2017-251-01.NASL description New bash packages are available for Slackware 13.1, 13.37, 14.0, 14.1, and 14.2 to fix security issues. last seen 2020-06-01 modified 2020-06-02 plugin id 103089 published 2017-09-11 reporter This script is Copyright (C) 2017 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/103089 title Slackware 13.1 / 13.37 / 14.0 / 14.1 / 14.2 : bash (SSA:2017-251-01) NASL family Scientific Linux Local Security Checks NASL id SL_20170321_BASH_ON_SL6_X.NASL description Security Fix(es) : - An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) - An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) - A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) last seen 2020-03-18 modified 2017-04-06 plugin id 99214 published 2017-04-06 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99214 title Scientific Linux Security Update : bash on SL6.x i386/x86_64 (20170321) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2017-0725.NASL description An update for bash is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. The bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux. Security Fix(es) : * An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) * An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) * A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 97883 published 2017-03-22 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/97883 title RHEL 6 : bash (RHSA-2017:0725) NASL family SuSE Local Security Checks NASL id SUSE_SU-2018-1398-2.NASL description This update for bash fixes the following issues : Security issues fixed : CVE-2016-7543: A code execution possibility via SHELLOPTS+PS4 variable was fixed (bsc#1001299) CVE-2016-0634: Arbitrary code execution via malicious hostname was fixed (bsc#1000396) Non-security issues fixed: Fix repeating self-calling of traps due the combination of a non-interactive shell, a trap handler for SIGINT, an external process in the trap handler, and a SIGINT within the trap after the external process runs. (bsc#1086247) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 118257 published 2018-10-22 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/118257 title SUSE SLES12 Security Update : bash (SUSE-SU-2018:1398-2) NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-1260.NASL description This update for bash fixes the following security issues : - CVE-2016-7543: Local attackers could have executed arbitrary commands via specially crafted SHELLOPTS+PS4 variables (bsc#1001299) - CVE-2016-0634: Malicious hostnames could have allowed arbitrary command execution when $HOSTNAME was expanded in the prompt (bsc#1000396) This update also fixes the following bugs : - fix a crash found during debugging boo#971410 - boo#976776: crash if ~/.bash_history is empty (boo#976776) last seen 2020-06-05 modified 2016-11-04 plugin id 94530 published 2016-11-04 reporter This script is Copyright (C) 2016-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/94530 title openSUSE Security Update : bash (openSUSE-2016-1260) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3294-1.NASL description Bernd Dietzel discovered that Bash incorrectly expanded the hostname when displaying the prompt. If a remote attacker were able to modify a hostname, this flaw could be exploited to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-0634) It was discovered that Bash incorrectly handled the SHELLOPTS and PS4 environment variables. A local attacker could use this issue to execute arbitrary code with root privileges. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7543) It was discovered that Bash incorrectly handled the popd command. A remote attacker could possibly use this issue to bypass restricted shells. (CVE-2016-9401) It was discovered that Bash incorrectly handled path autocompletion. A local attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 17.04. (CVE-2017-5932). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 100268 published 2017-05-18 reporter Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100268 title Ubuntu 14.04 LTS / 16.04 LTS / 16.10 / 17.04 : bash vulnerabilities (USN-3294-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2017-1164.NASL description According to the versions of the bash package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) - An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) - A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-06 modified 2017-09-08 plugin id 103002 published 2017-09-08 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103002 title EulerOS 2.0 SP2 : bash (EulerOS-SA-2017-1164) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2017-878.NASL description popd controlled free : A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session.(CVE-2016-9401) Arbitrary code execution via malicious hostname : An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances.(CVE-2016-0634) Specially crafted SHELLOPTS+PS4 variables allows command substitution : An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) last seen 2020-06-01 modified 2020-06-02 plugin id 102866 published 2017-09-01 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/102866 title Amazon Linux AMI : bash (ALAS-2017-878) NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-0302-1.NASL description This update for bash fixes the following issues : - CVE-2016-7543: Local attackers could have executed arbitrary commands via specially crafted SHELLOPTS+PS4 variables. (bsc#1001299) - CVE-2016-0634: Malicious hostnames could have allowed arbitrary command execution when $HOSTNAME was expanded in the prompt. (bsc#1000396) The following bugs were fixed : - bsc#971410: Scripts could terminate unexpectedly due to mishandled recursive traps. - bsc#959755: Clarify that the files /etc/profile as well as /etc/bash.bashrc may source other files as well even if the bash does not. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 96868 published 2017-01-30 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96868 title SUSE SLES11 Security Update : bash (SUSE-SU-2017:0302-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2017-1931.NASL description An update for bash is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. The bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux. Security Fix(es) : * An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) * An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) * A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 102105 published 2017-08-02 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/102105 title RHEL 7 : bash (RHSA-2017:1931) NASL family Fedora Local Security Checks NASL id FEDORA_2016-A822B472C4.NASL description Security fix for CVE-2016-0634. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-09-27 plugin id 93728 published 2016-09-27 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93728 title Fedora 24 : bash (2016-a822b472c4) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-1931.NASL description From Red Hat Security Advisory 2017:1931 : An update for bash is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. The bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux. Security Fix(es) : * An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) * An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) * A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 102289 published 2017-08-09 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/102289 title Oracle Linux 7 : bash (ELSA-2017-1931) NASL family Scientific Linux Local Security Checks NASL id SL_20170801_BASH_ON_SL7_X.NASL description Security Fix(es) : - An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) - An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) - A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) last seen 2020-03-18 modified 2017-08-22 plugin id 102638 published 2017-08-22 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/102638 title Scientific Linux Security Update : bash on SL7.x x86_64 (20170801) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2017-0040_BASH.NASL description An update of the bash package has been released. last seen 2020-03-17 modified 2019-02-07 plugin id 121741 published 2019-02-07 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121741 title Photon OS 1.0: Bash PHSA-2017-0040 NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2017-1931.NASL description An update for bash is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. The bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux. Security Fix(es) : * An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) * An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) * A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 102744 published 2017-08-25 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/102744 title CentOS 7 : bash (CESA-2017:1931) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201612-39.NASL description The remote host is affected by the vulnerability described in GLSA-201612-39 (Bash: Arbitrary code execution) A vulnerability was found in the way Bash expands $HOSTNAME. Injecting malicious code into $HOSTNAME could cause it to run each time Bash expands \\h in the prompt string. Impact : A remote attacker controlling the system’s hostname (i.e. via DHCP) could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 95742 published 2016-12-13 reporter This script is Copyright (C) 2016-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/95742 title GLSA-201612-39 : Bash: Arbitrary code execution NASL family SuSE Local Security Checks NASL id OPENSUSE-2018-516.NASL description This update for bash fixes the following issues : Security issues fixed : - CVE-2016-7543: A code execution possibility via SHELLOPTS+PS4 variable was fixed (bsc#1001299) - CVE-2016-0634: Arbitrary code execution via malicious hostname was fixed (bsc#1000396) Non-security issues fixed : - Fix repeating self-calling of traps due the combination of a non-interactive shell, a trap handler for SIGINT, an external process in the trap handler, and a SIGINT within the trap after the external process runs. (bsc#1086247) This update was imported from the SUSE:SLE-12-SP2:Update update project. last seen 2020-06-05 modified 2018-05-25 plugin id 110106 published 2018-05-25 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/110106 title openSUSE Security Update : bash (openSUSE-2018-516) NASL family Fedora Local Security Checks NASL id FEDORA_2016-EDA100D886.NASL description Security fix for CVE-2016-0634. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-11-15 plugin id 94876 published 2016-11-15 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/94876 title Fedora 25 : bash (2016-eda100d886) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2017-0050.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - Fix signal handling in read builtin Resolves: #1421926 - CVE-2016-9401 - Fix crash when last seen 2020-06-01 modified 2020-06-02 plugin id 99077 published 2017-03-30 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99077 title OracleVM 3.3 / 3.4 : bash (OVMSA-2017-0050) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0108_BASH.NASL description The remote NewStart CGSL host, running version MAIN 4.05, has bash packages installed that are affected by multiple vulnerabilities: - A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) - An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) - An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 127342 published 2019-08-12 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127342 title NewStart CGSL MAIN 4.05 : bash Multiple Vulnerabilities (NS-SA-2019-0108) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-2872-1.NASL description This update for bash fixes the following issues : - CVE-2016-7543: Local attackers could have executed arbitrary commands via specially crafted SHELLOPTS+PS4 variables (bsc#1001299) - CVE-2016-0634: Malicious hostnames could have allowed arbitrary command execution when $HOSTNAME was expanded in the prompt (bsc#1000396) - CVE-2014-6277: More troubles with functions (bsc#898812, bsc#1001759) - CVE-2014-6278: Code execution after original 6271 fix (bsc#898884) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 95282 published 2016-11-23 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95282 title SUSE SLED12 / SLES12 Security Update : bash (SUSE-SU-2016:2872-1) (Shellshock) NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-1374.NASL description This update for bash fixes the following issues : - CVE-2016-7543: Local attackers could have executed arbitrary commands via specially crafted SHELLOPTS+PS4 variables (bsc#1001299) - CVE-2016-0634: Malicious hostnames could have allowed arbitrary command execution when $HOSTNAME was expanded in the prompt (bsc#1000396) - CVE-2014-6277: More troubles with functions (bsc#898812, bsc#1001759) - CVE-2014-6278: Code execution after original 6271 fix (bsc#898884) This update was imported from the SUSE:SLE-12:Update update project. last seen 2020-06-05 modified 2016-12-05 plugin id 95529 published 2016-12-05 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95529 title openSUSE Security Update : bash (openSUSE-2016-1374) (Shellshock) NASL family SuSE Local Security Checks NASL id SUSE_SU-2018-1398-1.NASL description This update for bash fixes the following issues: Security issues fixed : - CVE-2016-7543: A code execution possibility via SHELLOPTS+PS4 variable was fixed (bsc#1001299) - CVE-2016-0634: Arbitrary code execution via malicious hostname was fixed (bsc#1000396) Non-security issues fixed : - Fix repeating self-calling of traps due the combination of a non-interactive shell, a trap handler for SIGINT, an external process in the trap handler, and a SIGINT within the trap after the external process runs. (bsc#1086247) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 110092 published 2018-05-24 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/110092 title SUSE SLED12 / SLES12 Security Update : bash (SUSE-SU-2018:1398-1) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2017-0725.NASL description An update for bash is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. The bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux. Security Fix(es) : * An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) * An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) * A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 97959 published 2017-03-27 reporter This script is Copyright (C) 2017 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/97959 title CentOS 6 : bash (CESA-2017:0725) NASL family Fedora Local Security Checks NASL id FEDORA_2016-62E6C462EF.NASL description Security fix for CVE-2016-0634. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-09-27 plugin id 93725 published 2016-09-27 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93725 title Fedora 23 : bash (2016-62e6c462ef) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-0725.NASL description From Red Hat Security Advisory 2017:0725 : An update for bash is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. The bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux. Security Fix(es) : * An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) * An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) * A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 99071 published 2017-03-30 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99071 title Oracle Linux 6 : bash (ELSA-2017-0725) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2017-1163.NASL description According to the versions of the bash package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances. (CVE-2016-0634) - An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. (CVE-2016-7543) - A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. (CVE-2016-9401) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-06 modified 2017-09-08 plugin id 103001 published 2017-09-08 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103001 title EulerOS 2.0 SP1 : bash (EulerOS-SA-2017-1163)
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References
- http://rhn.redhat.com/errata/RHSA-2017-0725.html
- http://www.openwall.com/lists/oss-security/2016/09/16/12
- http://www.openwall.com/lists/oss-security/2016/09/16/8
- http://www.openwall.com/lists/oss-security/2016/09/18/11
- http://www.openwall.com/lists/oss-security/2016/09/19/7
- http://www.openwall.com/lists/oss-security/2016/09/20/1
- http://www.openwall.com/lists/oss-security/2016/09/27/9
- http://www.openwall.com/lists/oss-security/2016/09/29/27
- http://www.openwall.com/lists/oss-security/2016/10/07/6
- http://www.openwall.com/lists/oss-security/2016/10/10/3
- http://www.openwall.com/lists/oss-security/2016/10/10/4
- http://www.securityfocus.com/bid/92999
- https://access.redhat.com/errata/RHSA-2017:1931
- https://bugzilla.redhat.com/show_bug.cgi?id=1377613
- https://security.gentoo.org/glsa/201612-39