52 lines
1.8 KiB
XML
52 lines
1.8 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="202012-06">
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<title>Linux-PAM: Authentication bypass</title>
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<synopsis>A vulnerability has been found in Linux-PAM, allowing attackers to
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bypass the authentication process.
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</synopsis>
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<product type="ebuild">pam</product>
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<announced>2020-12-07</announced>
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<revised count="1">2020-12-07</revised>
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<bug>756361</bug>
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<access>local, remote</access>
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<affected>
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<package name="sys-libs/pam" auto="yes" arch="*">
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<unaffected range="ge">1.5.1</unaffected>
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<vulnerable range="lt">1.5.1</vulnerable>
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</package>
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</affected>
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<background>
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<p>Linux-PAM (Pluggable Authentication Modules) is an architecture allowing
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the separation of the development of privilege granting software from the
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development of secure and appropriate authentication schemes.
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</p>
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</background>
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<description>
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<p>A flaw was found in Linux-Pam in the way it handle empty passwords for
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non-existing users.
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</p>
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</description>
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<impact type="normal">
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<p>A remote attacker, who only needs to know a non-existing username, could
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bypass security restrictions and authenticate as root user.
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</p>
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</impact>
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<workaround>
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<p>Ensure that root account is protected by a non-empty password.</p>
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</workaround>
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<resolution>
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<p>All Linux-PAM users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=sys-libs/pam-1.5.1"
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</code>
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</resolution>
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<references>
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<uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-27780">CVE-2020-27780</uri>
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</references>
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<metadata tag="requester" timestamp="2020-11-26T02:08:08Z">sam_c</metadata>
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<metadata tag="submitter" timestamp="2020-12-07T00:19:35Z">whissi</metadata>
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</glsa>
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