High severity7.4NVD Advisory· Published Dec 16, 2015· Updated Jun 17, 2026
CVE-2015-8370
CVE-2015-8370
Description
Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1) grub_username_get function in grub-core/normal/auth.c or the (2) grub_password_get function in lib/crypto.c, which trigger an "Off-by-two" or "Out of bounds overwrite" memory error.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
21- cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
- osv-coords14 versionspkg:rpm/opensuse/grub2&distro=openSUSE%20Tumbleweedpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP3pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP3pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1
< 2.02~beta3-15.1+ 13 more
- (no CPE)range: < 2.02~beta3-15.1
- (no CPE)range: < 2.00-0.49.2
- (no CPE)range: < 2.00-0.54.2
- (no CPE)range: < 2.02~beta2-56.9.4
- (no CPE)range: < 2.02~beta2-73.3
- (no CPE)range: < 2.00-0.49.2
- (no CPE)range: < 2.00-0.49.2
- (no CPE)range: < 2.00-0.54.2
- (no CPE)range: < 2.02~beta2-56.9.4
- (no CPE)range: < 2.02~beta2-73.3
- (no CPE)range: < 2.00-0.49.2
- (no CPE)range: < 2.00-0.54.2
- (no CPE)range: < 2.02~beta2-56.9.4
- (no CPE)range: < 2.02~beta2-73.3
Patches
Vulnerability mechanics
References
23- www.oracle.com/technetwork/topics/security/cpujan2016-2367955.htmlnvdPatch
- hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.htmlnvdExploit
- lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.htmlnvd
- lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00037.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00043.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00003.htmlnvd
- packetstormsecurity.com/files/134831/Grub2-Authentication-Bypass.htmlnvd
- rhn.redhat.com/errata/RHSA-2015-2623.htmlnvd
- seclists.org/fulldisclosure/2015/Dec/69nvd
- www.debian.org/security/2015/dsa-3421nvd
- www.openwall.com/lists/oss-security/2015/12/15/6nvd
- www.openwall.com/lists/oss-security/2024/01/15/3nvd
- www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.htmlnvd
- www.securityfocus.com/archive/1/537115/100/0/threadednvd
- www.securityfocus.com/bid/79358nvd
- www.securitytracker.com/id/1034422nvd
- www.ubuntu.com/usn/USN-2836-1nvd
- security.gentoo.org/glsa/201512-03nvd
News mentions
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