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Gentoo Linux Security Advisory GLSA 201903-02 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: Zsh: User-assisted execution of arbitrary code |
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Date: March 10, 2019 |
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Bugs: #665278 |
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ID: 201903-02 |
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Synopsis |
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======== |
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|
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Input validation errors in Zsh could result in arbitrary code |
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execution. |
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Background |
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========== |
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|
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A shell designed for interactive use, although it is also a powerful |
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scripting language. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 app-shells/zsh < 5.6 >= 5.6 |
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Description |
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=========== |
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|
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Two input validation errors have been discovered in how Zsh parses |
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scripts: |
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* Parsing a malformed shebang line could cause Zsh to call a program |
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listed in the second line (CVE-2018-0502) |
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* Shebang lines longer than 64 characters are truncated |
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(CVE-2018-13259) |
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|
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Impact |
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====== |
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|
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An attacker could entice a user to execute a specially crafted script |
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using Zsh, possibly resulting in execution of arbitrary code with the |
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privileges of the process. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All Zsh users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-shells/zsh-5.6" |
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References |
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========== |
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[ 1 ] CVE-2018-0502 |
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https://nvd.nist.gov/vuln/detail/CVE-2018-0502 |
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[ 2 ] CVE-2018-13259 |
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https://nvd.nist.gov/vuln/detail/CVE-2018-13259 |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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https://security.gentoo.org/glsa/201903-02 |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users' machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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https://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2019 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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https://creativecommons.org/licenses/by-sa/2.5 |
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