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Gentoo Linux Security Advisory GLSA 201911-01 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: OpenSSH: Integer overflow |
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Date: November 07, 2019 |
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Bugs: #697046 |
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ID: 201911-01 |
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Synopsis |
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======== |
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|
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An integer overflow in OpenSSH might allow an attacker to execute |
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arbitrary code. |
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Background |
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========== |
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|
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OpenSSH is a complete SSH protocol implementation that includes SFTP |
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client and server support. |
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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 net-misc/openssh >= 8.0_p1-r2 >= 8.0_p1-r4 |
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Description |
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=========== |
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|
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OpenSSH, when built with "xmss" USE flag enabled, has a |
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pre-authentication integer overflow if a client or server is configured |
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to use a crafted XMSS key. |
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NOTE: This USE flag is disabled by default! |
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Impact |
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====== |
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|
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A remote attacker could connect to a vulnerable OpenSSH server using a |
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special crafted XMSS key possibly resulting in execution of arbitrary |
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code with the privileges of the process or a Denial of Service |
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condition. |
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|
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Workaround |
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========== |
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Disable XMSS key type. |
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Resolution |
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========== |
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All OpenSSH users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot -v ">=net-misc/openssh/openssh-8.0_p1-r4" |
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|
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References |
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========== |
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[ 1 ] CVE-2019-16905 |
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https://nvd.nist.gov/vuln/detail/CVE-2019-16905 |
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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/201911-01 |
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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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|
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https://creativecommons.org/licenses/by-sa/2.5 |
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