-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: bash security and bug fix update Advisory ID: RHSA-2017:1931-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2017:1931 Issue date: 2017-08-01 CVE Names: CVE-2016-0634 CVE-2016-7543 CVE-2016-9401 ===================================================================== 1. Summary: 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. 2. 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) - aarch64, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64 3. Description: 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. 4. 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 5. Bugs fixed (https://bugzilla.redhat.com/): 1264101 - memleaks 1267478 - cd: -e: invalid option 1372806 - bash stack smash due to longjmp back to wait_builtin after it returned 1377496 - command "cat < <(cat)" doesn't end with EOF, CTRL+C terminates the whole shell 1377613 - CVE-2016-0634 bash: Arbitrary code execution via malicious hostname 1379630 - CVE-2016-7543 bash: Specially crafted SHELLOPTS+PS4 variables allows command substitution 1396383 - CVE-2016-9401 bash: popd controlled free 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: bash-4.2.46-28.el7.src.rpm x86_64: bash-4.2.46-28.el7.x86_64.rpm bash-debuginfo-4.2.46-28.el7.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: bash-debuginfo-4.2.46-28.el7.x86_64.rpm bash-doc-4.2.46-28.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: bash-4.2.46-28.el7.src.rpm x86_64: bash-4.2.46-28.el7.x86_64.rpm bash-debuginfo-4.2.46-28.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): x86_64: bash-debuginfo-4.2.46-28.el7.x86_64.rpm bash-doc-4.2.46-28.el7.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: bash-4.2.46-28.el7.src.rpm aarch64: bash-4.2.46-28.el7.aarch64.rpm bash-debuginfo-4.2.46-28.el7.aarch64.rpm ppc64: bash-4.2.46-28.el7.ppc64.rpm bash-debuginfo-4.2.46-28.el7.ppc64.rpm ppc64le: bash-4.2.46-28.el7.ppc64le.rpm bash-debuginfo-4.2.46-28.el7.ppc64le.rpm s390x: bash-4.2.46-28.el7.s390x.rpm bash-debuginfo-4.2.46-28.el7.s390x.rpm x86_64: bash-4.2.46-28.el7.x86_64.rpm bash-debuginfo-4.2.46-28.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): aarch64: bash-debuginfo-4.2.46-28.el7.aarch64.rpm bash-doc-4.2.46-28.el7.aarch64.rpm ppc64: bash-debuginfo-4.2.46-28.el7.ppc64.rpm bash-doc-4.2.46-28.el7.ppc64.rpm ppc64le: bash-debuginfo-4.2.46-28.el7.ppc64le.rpm bash-doc-4.2.46-28.el7.ppc64le.rpm s390x: bash-debuginfo-4.2.46-28.el7.s390x.rpm bash-doc-4.2.46-28.el7.s390x.rpm x86_64: bash-debuginfo-4.2.46-28.el7.x86_64.rpm bash-doc-4.2.46-28.el7.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: bash-4.2.46-28.el7.src.rpm x86_64: bash-4.2.46-28.el7.x86_64.rpm bash-debuginfo-4.2.46-28.el7.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: bash-debuginfo-4.2.46-28.el7.x86_64.rpm bash-doc-4.2.46-28.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/ 7. References: https://access.redhat.com/security/cve/CVE-2016-0634 https://access.redhat.com/security/cve/CVE-2016-7543 https://access.redhat.com/security/cve/CVE-2016-9401 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.4_Release_Notes/index.html 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFZgOZfXlSAg2UNWIIRAtvlAKCKtbdGhEjNwOvt1G4Ic7RMbbxbswCcC5Xh lpxqfUZuv5N/xZC6mD2nWgc= =IFay -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce