Zahlenüberlauf in OpenSSH
ID: | 201911-01 |
Distribution: | Gentoo |
Plattformen: | Keine Angabe |
Datum: | Do, 7. November 2019, 23:21 |
Referenzen: | https://nvd.nist.gov/vuln/detail/CVE-2019-16905 |
Applikationen: | OpenSSH |
Originalnachricht |
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--sdtB3X0nJg68CQEu Content-Type: text/plain; charset=utf-8 Content-Disposition: inlin Content-Transfer-Encoding: quoted-printable - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201911-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: OpenSSH: Integer overflow Date: November 07, 2019 Bugs: #697046 ID: 201911-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== An integer overflow in OpenSSH might allow an attacker to execute arbitrary code. Background ========== OpenSSH is a complete SSH protocol implementation that includes SFTP client and server support. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/openssh >= 8.0_p1-r2 >= 8.0_p1-r4 Description =========== OpenSSH, when built with "xmss" USE flag enabled, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. NOTE: This USE flag is disabled by default! Impact ====== A remote attacker could connect to a vulnerable OpenSSH server using a special crafted XMSS key possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition. Workaround ========== Disable XMSS key type. Resolution ========== All OpenSSH users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot -v ">=net-misc/openssh/openssh-8.0_p1-r4" References ========== [ 1 ] CVE-2019-16905 https://nvd.nist.gov/vuln/detail/CVE-2019-16905 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201911-01 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2019 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5 --sdtB3X0nJg68CQEu Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEDA48qNrrn8VVVcst4yp5f7HQy3AFAl3Eam4ACgkQ4yp5f7HQ y3CaNgf9ECHcZtkA5MB5GnvODtc2Sq+z3QofmLJe/dSNneo07Ozt3+DOJ7ebMwlt 6tVGlRDEGbpmPEZ0bLYv4W+KBwUc3wh9ZZCQZLQ8o8W27+WQIWh0mW0b8oVjptBN L1B3Rj3OqaYBm0BfkptGSMdDaxQsD4zrf7A97UoxB/VpdTJ9o6nDpVsD8Iadwqm3 EPcfOX+MPAsB+vSrVDErqX/3GtZzLVlol0ZgYmo/paPXC0hYcxkq3XYDaJyef/cP iaeYbLyBaW3y+dEEk4KbvLUc/kf1hy2A5GSsuMVQovxqUMLrkCoE0AfUwMkszMoI 1VGgUm0eb/imFlEcb6z0Wv6TYIndQA== =tWW/ -----END PGP SIGNATURE----- --sdtB3X0nJg68CQEu-- |