RedHat: RHSA-2018-3073:01 Moderate: zsh security and bug fix update
Summary
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):
* zsh: Stack-based buffer overflow in gen_matches_files() at compctl.c
(CVE-2018-1083)
* zsh: buffer overflow for very long fds in >& fd syntax (CVE-2014-10071)
* zsh: buffer overflow when scanning very long directory paths for symbolic
links (CVE-2014-10072)
* zsh: NULL dereference in cd in sh compatibility mode under given
circumstances (CVE-2017-18205)
* zsh: buffer overrun in symlinks (CVE-2017-18206)
* zsh: Stack-based buffer overflow in exec.c:hashcmd() (CVE-2018-1071)
* zsh: buffer overflow in utils.c:checkmailpath() can lead to local
arbitrary code execution (CVE-2018-1100)
* zsh: crash on copying empty hash table (CVE-2018-7549)
For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.
The CVE-2018-1083, CVE-2018-1071, and CVE-2018-1100 issues were discovered
by Richard Maciel Costa (Red Hat).
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.6 Release Notes linked from the References section.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
References
https://access.redhat.com/security/cve/CVE-2014-10071 https://access.redhat.com/security/cve/CVE-2014-10072 https://access.redhat.com/security/cve/CVE-2017-18205 https://access.redhat.com/security/cve/CVE-2017-18206 https://access.redhat.com/security/cve/CVE-2018-1071 https://access.redhat.com/security/cve/CVE-2018-1083 https://access.redhat.com/security/cve/CVE-2018-1100 https://access.redhat.com/security/cve/CVE-2018-7549 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.6_release_notes/index
Package List
Red Hat Enterprise Linux Client (v. 7):
Source:
zsh-5.0.2-31.el7.src.rpm
x86_64:
zsh-5.0.2-31.el7.x86_64.rpm
zsh-debuginfo-5.0.2-31.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64:
zsh-debuginfo-5.0.2-31.el7.x86_64.rpm
zsh-html-5.0.2-31.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
zsh-5.0.2-31.el7.src.rpm
x86_64:
zsh-5.0.2-31.el7.x86_64.rpm
zsh-debuginfo-5.0.2-31.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64:
zsh-debuginfo-5.0.2-31.el7.x86_64.rpm
zsh-html-5.0.2-31.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
zsh-5.0.2-31.el7.src.rpm
ppc64:
zsh-5.0.2-31.el7.ppc64.rpm
zsh-debuginfo-5.0.2-31.el7.ppc64.rpm
ppc64le:
zsh-5.0.2-31.el7.ppc64le.rpm
zsh-debuginfo-5.0.2-31.el7.ppc64le.rpm
s390x:
zsh-5.0.2-31.el7.s390x.rpm
zsh-debuginfo-5.0.2-31.el7.s390x.rpm
x86_64:
zsh-5.0.2-31.el7.x86_64.rpm
zsh-debuginfo-5.0.2-31.el7.x86_64.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source:
zsh-5.0.2-31.el7.src.rpm
aarch64:
zsh-5.0.2-31.el7.aarch64.rpm
zsh-debuginfo-5.0.2-31.el7.aarch64.rpm
ppc64le:
zsh-5.0.2-31.el7.ppc64le.rpm
zsh-debuginfo-5.0.2-31.el7.ppc64le.rpm
s390x:
zsh-5.0.2-31.el7.s390x.rpm
zsh-debuginfo-5.0.2-31.el7.s390x.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):
aarch64:
zsh-debuginfo-5.0.2-31.el7.aarch64.rpm
zsh-html-5.0.2-31.el7.aarch64.rpm
ppc64le:
zsh-debuginfo-5.0.2-31.el7.ppc64le.rpm
zsh-html-5.0.2-31.el7.ppc64le.rpm
s390x:
zsh-debuginfo-5.0.2-31.el7.s390x.rpm
zsh-html-5.0.2-31.el7.s390x.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
ppc64:
zsh-debuginfo-5.0.2-31.el7.ppc64.rpm
zsh-html-5.0.2-31.el7.ppc64.rpm
ppc64le:
zsh-debuginfo-5.0.2-31.el7.ppc64le.rpm
zsh-html-5.0.2-31.el7.ppc64le.rpm
s390x:
zsh-debuginfo-5.0.2-31.el7.s390x.rpm
zsh-html-5.0.2-31.el7.s390x.rpm
x86_64:
zsh-debuginfo-5.0.2-31.el7.x86_64.rpm
zsh-html-5.0.2-31.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
zsh-5.0.2-31.el7.src.rpm
x86_64:
zsh-5.0.2-31.el7.x86_64.rpm
zsh-debuginfo-5.0.2-31.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64:
zsh-debuginfo-5.0.2-31.el7.x86_64.rpm
zsh-html-5.0.2-31.el7.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/
Topic
An update for zsh is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le, s390x
Bugs Fixed
1549836 - CVE-2014-10072 zsh: buffer overflow when scanning very long directory paths for symbolic links
1549855 - CVE-2014-10071 zsh: buffer overflow for very long fds in >& fd syntax
1549858 - CVE-2018-7549 zsh: crash on copying empty hash table
1549861 - CVE-2017-18206 zsh: buffer overrun in symlinks
1549862 - CVE-2017-18205 zsh: NULL dereference in cd in sh compatibility mode under given circumstances
1553531 - CVE-2018-1071 zsh: Stack-based buffer overflow in exec.c:hashcmd()
1557382 - CVE-2018-1083 zsh: Stack-based buffer overflow in gen_matches_files() at compctl.c
1563395 - CVE-2018-1100 zsh: buffer overflow in utils.c:checkmailpath() can lead to local arbitrary code execution
