zsh before 5.0.7 allows evaluation of the initial values of integer variables imported from the environment (instead of treating them as literal numbers). That could allow local privilege escalation, under some specific and atypical conditions where zsh is being invoked in privilege-elevation contexts when the environment has not been properly sanitized, such as when zsh is invoked by sudo on systems where "env_reset" has been disabled.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - zsh before 5.0.7 allows evaluation of the initial values of integer variables imported from the     environment (instead of treating them as literal numbers). That could allow local privilege escalation,     under some specific and atypical conditions where zsh is being invoked in privilege-elevation contexts     when the environment has not been properly sanitized, such as when zsh is invoked by sudo on systems where     env_reset has been disabled. (CVE-2014-10070)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote SUSE Linux SLES11 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:14910-1 advisory.

  - zsh before 5.0.7 allows evaluation of the initial values of integer variables imported from the     environment (instead of treating them as literal numbers). That could allow local privilege escalation,     under some specific and atypical conditions where zsh is being invoked in privilege-elevation contexts     when the environment has not been properly sanitized, such as when zsh is invoked by sudo on systems where     env_reset has been disabled. (CVE-2014-10070)

  - In exec.c in zsh before 5.0.7, there is a buffer overflow for very long fds in the >& fd syntax.
    (CVE-2014-10071)

  - In utils.c in zsh before 5.0.6, there is a buffer overflow when scanning very long directory paths for     symbolic links. (CVE-2014-10072)

  - In zsh before 5.3, an off-by-one error resulted in undersized buffers that were intended to support     PATH_MAX characters. (CVE-2016-10714)

  - In builtin.c in zsh before 5.4, when sh compatibility mode is used, there is a NULL pointer dereference     during processing of the cd command with no argument if HOME is not set. (CVE-2017-18205)

  - In utils.c in zsh before 5.4, symlink expansion had a buffer overflow. (CVE-2017-18206)

  - An issue was discovered in zsh before 5.6. The beginning of a #! script file was mishandled, potentially     leading to an execve call to a program named on the second line. (CVE-2018-0502)

  - zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the exec.c:hashcmd() function.
    A local attacker could exploit this to cause a denial of service. (CVE-2018-1071)

  - Zsh before version 5.4.2-test-1 is vulnerable to a buffer overflow in the shell autocomplete     functionality. A local unprivileged user can create a specially crafted directory path which leads to code     execution in the context of the user who tries to use autocomplete to traverse the before mentioned path.
    If the user affected is privileged, this leads to privilege escalation. (CVE-2018-1083)

  - An issue was discovered in zsh before 5.6. Shebang lines exceeding 64 characters were truncated,     potentially leading to an execve call to a program name that is a substring of the intended one.
    (CVE-2018-13259)

  - In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated     by typeset -p. (CVE-2018-7549)

  - In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED     option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing     MODULE_PATH=/dir/with/module zmodload with a module that calls setuid(). (CVE-2019-20044)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the zsh package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The zsh shell is a command interpreter usable as an     interactive login shell and as a shell script command     processor. Zsh resembles the ksh shell (the Korn     shell), but includes many enhancements. Zsh supports     command line editing, built-in spelling correction,     programmable command completion, shell functions (with     autoloading), a history mechanism, and more.

  - Security fix(es):

  - In builtin.c in zsh before 5.4, when sh compatibility     mode is used, there is a NULL pointer dereference     during processing of the cd command with no argument if     HOME is not set.(CVE-2017-18205)

  - zsh before 5.0.7 allows evaluation of the initial     values of integer variables imported from the     environment (instead of treating them as literal     numbers). That could allow local privilege escalation,     under some specific and atypical conditions where zsh     is being invoked in privilege-elevation contexts when     the environment has not been properly sanitized, such     as when zsh is invoked by sudo on systems where     'env_reset' has been disabled.(CVE-2014-10070)

  - In exec.c in zsh before 5.0.7, there is a buffer     overflow for very long fds in the 'i1/4zi1/4+ fd'     syntax.(CVE-2014-10071)

  - A buffer overflow flaw was found in the zsh shell     symbolic link resolver. A local, unprivileged user can     create a specially crafted directory path which leads     to a buffer overflow in the context of the user trying     to do a symbolic link resolution in the aforementioned     path. If the user affected is privileged, this leads to     privilege escalation.(CVE-2017-18206)

  - In params.c in zsh through 5.4.2, there is a crash     during a copy of an empty hash table, as demonstrated     by typeset -p.(CVE-2018-7549)

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.

This update for zsh fixes the following issues :

  - CVE-2014-10070: environment variable injection could     lead to local privilege escalation (bnc#1082885)

  - CVE-2014-10071: buffer overflow in exec.c could lead to     denial of service. (bnc#1082977)

  - CVE-2014-10072: buffer overflow In utils.c when scanning     very long directory paths for symbolic links.
    (bnc#1082975)

  - CVE-2016-10714: In zsh before 5.3, an off-by-one error     resulted in undersized buffers that were intended to     support PATH_MAX characters. (bnc#1083250)

  - CVE-2017-18205: In builtin.c when sh compatibility mode     is used, a NULL pointer dereference could lead to denial     of service (bnc#1082998)

  - CVE-2018-1071: exec.c:hashcmd() function vulnerability     could lead to denial of service. (bnc#1084656)

  - CVE-2018-1083: Autocomplete vulnerability could lead to     privilege escalation. (bnc#1087026)

  - CVE-2018-7549: In params.c in zsh through 5.4.2, there     is a crash during a copy of an empty hash table, as     demonstrated by typeset -p. (bnc#1082991)

  - CVE-2017-18206: buffer overrun in xsymlinks could lead     to denial of service (bnc#1083002)

  - Autocomplete and REPORTTIME broken (bsc#896914)

This update was imported from the SUSE:SLE-12:Update update project.

This update for zsh fixes the following issues :

  - CVE-2014-10070: environment variable injection could     lead to local privilege escalation (bnc#1082885)

  - CVE-2014-10071: buffer overflow in exec.c could lead to     denial of service. (bnc#1082977)

  - CVE-2014-10072: buffer overflow In utils.c when scanning     very long directory paths for symbolic links.
    (bnc#1082975)

  - CVE-2016-10714: In zsh before 5.3, an off-by-one error     resulted in undersized buffers that were intended to     support PATH_MAX characters. (bnc#1083250)

  - CVE-2017-18205: In builtin.c when sh compatibility mode     is used, a NULL pointer dereference could lead to denial     of service (bnc#1082998)

  - CVE-2018-1071: exec.c:hashcmd() function vulnerability     could lead to denial of service. (bnc#1084656)

  - CVE-2018-1083: Autocomplete vulnerability could lead to     privilege escalation. (bnc#1087026)

  - CVE-2018-7549: In params.c in zsh through 5.4.2, there     is a crash during a copy of an empty hash table, as     demonstrated by typeset -p. (bnc#1082991)

  - CVE-2017-18206: buffer overrun in xsymlinks could lead     to denial of service (bnc#1083002)

  - Autocomplete and REPORTTIME broken (bsc#896914)

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.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3593-1 advisory.

    It was discovered that Zsh incorrectly handled certain enviroment variables. An attacker could possibly     use this issue to gain privileged access to the system. This issue only affected Ubuntu 14.04 LTS.
    (CVE-2014-10070)

    It was discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to     execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-10071)

    It was discovered that Zsh incorrectly handled some symbolic links. An attacker could possibly use this to     execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-10072)

    It was discovered that Zsh incorrectly handled certain errors. An attacker could possibly use this issue     to cause a denial of service. (CVE-2016-10714)

    It was discovered that Zsh incorrectly handled certain commands. An attacker could possibly use this to     execute arbitrary code. (CVE-2017-18205)

    It was discovered that Zsh incorrectly handled certain symlinks. An attacker could possibly use this to     execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-18206)

    It was discovered that Zsh incorrectly handled certain inputs. An attacker could possible use to execute     arbitrary code. This issue only affected Ubuntu 17.10. (CVE-2018-7548)

    It was discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to     cause a denial of service. (CVE-2018-7549)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
218177	Linux Distros Unpatched Vulnerability : CVE-2014-10070	Nessus	Misc.	high
159025	SUSE SLES11 Security Update : zsh (SUSE-SU-2022:14910-1)	Nessus	SuSE Local Security Checks	critical
109489	EulerOS 2.0 SP2 : zsh (EulerOS-SA-2018-1091)	Nessus	Huawei Local Security Checks	critical
109488	EulerOS 2.0 SP1 : zsh (EulerOS-SA-2018-1090)	Nessus	Huawei Local Security Checks	critical
109384	openSUSE Security Update : zsh (openSUSE-2018-399)	Nessus	SuSE Local Security Checks	critical
109355	SUSE SLED12 / SLES12 Security Update : zsh (SUSE-SU-2018:1072-1)	Nessus	SuSE Local Security Checks	critical
107257	Ubuntu 14.04 LTS / 16.04 LTS : Zsh vulnerabilities (USN-3593-1)	Nessus	Ubuntu Local Security Checks	critical

Detections

Analytics

CVE-2014-10070

high

Tenable Plugins

high

critical

critical

critical

critical

critical

critical