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| author |   Tobias Heinlein <keytoaster@gentoo.org> | 2015-12-19 15:31:35 +0100 |
|---|---|---|
| committer | Tobias Heinlein <keytoaster@gentoo.org> | 2015-12-19 15:31:35 +0100 |
| commit | fe2562e8e55e693c7dd26553e49d6b462a38b98e (patch) | |
| tree | f6d8d590b0456a0c94d4ff95f7c74ee6b6ec8ec7 /glsa-201512-03.xml | |
| parent | Add GLSA 201512-02 (diff) | |
| download | glsa-fe2562e8e55e693c7dd26553e49d6b462a38b98e.tar.gz glsa-fe2562e8e55e693c7dd26553e49d6b462a38b98e.tar.bz2 glsa-fe2562e8e55e693c7dd26553e49d6b462a38b98e.zip | |
GLSA 201512-03
Diffstat (limited to 'glsa-201512-03.xml')
| -rw-r--r-- | glsa-201512-03.xml | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/glsa-201512-03.xml b/glsa-201512-03.xml new file mode 100644 index 00000000..d61b21a4 --- /dev/null +++ b/glsa-201512-03.xml @@ -0,0 +1,63 @@ +<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="201512-03">
+ <title>GRUB: Authentication bypass</title>
+ <synopsis>GRUB's authentication prompt can be bypassed by entering a sequence
+ of backspace characters.
+ </synopsis>
+ <product type="ebuild">grub</product>
+ <announced>December 19, 2015</announced>
+ <revised>December 19, 2015: 1</revised>
+ <bug>568326</bug>
+ <access>local</access>
+ <affected>
+ <package name="sys-boot/grub" auto="no" arch="*">
+ <unaffected range="ge">2.02_beta2-r8</unaffected>
+ <unaffected range="rge">0.97</unaffected>
+ <vulnerable range="lt">2.02_beta2-r8</vulnerable>
+ </package>
+ </affected>
+ <background>
+ <p>GNU GRUB is a multiboot boot loader used by most Linux systems.</p>
+ </background>
+ <description>
+ <p>An integer underflow in GRUB’s username/password authentication code
+ has been discovered.
+ </p>
+ </description>
+ <impact type="normal">
+ <p>An attacker with access to the system console may bypass the username
+ prompt by entering a sequence of backspace characters, allowing them e.g.
+ to get full access to GRUB’s console or to load a customized kernel.
+ </p>
+ </impact>
+ <workaround>
+ <p>There is no known workaround at this time.</p>
+ </workaround>
+ <resolution>
+ <p>All GRUB 2.x users should upgrade to the latest version:</p>
+
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose ">=sys-boot/grub-2.02_beta2-r8"
+ </code>
+
+ <p>After upgrading, make sure to run the grub2-install command with options
+ appropriate for your system. See the GRUB2 Quick Start guide in the
+ references below for examples. Your system will be vulnerable until this
+ action is performed.
+ </p>
+ </resolution>
+ <references>
+ <uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8370">CVE-2015-8370</uri>
+ <uri link="https://wiki.gentoo.org/wiki/GRUB2_Quick_Start">GRUB2 Quick
+ Start guide
+ </uri>
+ </references>
+ <metadata tag="requester" timestamp="Sat, 19 Dec 2015 13:09:44 +0000">
+ keytoaster
+ </metadata>
+ <metadata tag="submitter" timestamp="Sat, 19 Dec 2015 14:20:07 +0000">
+ keytoaster
+ </metadata>
+</glsa>
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