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Gentoo Linux Security Advisory GLSA 201706-27 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: FreeRADIUS: Security bypass |
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Date: June 27, 2017 |
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Bugs: #620186 |
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ID: 201706-27 |
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Synopsis |
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======== |
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|
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A vulnerability in FreeRADIUS might allow remote attackers to bypass |
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authentication. |
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Background |
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========== |
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FreeRADIUS is an open source RADIUS authentication server. |
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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-dialup/freeradius < 3.0.14 >= 3.0.14 |
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Description |
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=========== |
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It was discovered that the implementation of TTLS and PEAP in |
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FreeRADIUS skips inner authentication when it handles a resumed TLS |
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connection. The affected versions of FreeRADIUS fails to reliably |
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prevent the resumption of unauthenticated sessions unless the TLS |
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session cache is disabled completely. |
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Impact |
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====== |
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An unauthenticated remote user can bypass authentication by starting a |
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session, and then resuming an unauthenticated TLS session before inner |
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authentication has been completed successfully. |
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Workaround |
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========== |
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Set "enabled = no" in the cache subsection of eap module settings to |
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disable TLS session caching. |
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Resolution |
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========== |
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All FreeRADIUS users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-dialup/freeradius-3.0.14" |
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References |
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========== |
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[ 1 ] CVE-2017-9148 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-9148 |
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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/201706-27 |
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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 2017 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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http://creativecommons.org/licenses/by-sa/2.5 |
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