- -------------------------------------------------------------------------
Debian Security Advisory DSA-3421-1                   security@debian.org
https://www.debian.org/security/                            Luciano Bello
December 16, 2015                     https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : grub2
CVE ID         : CVE-2015-8370
Debian Bug     : 807614

Hector Marco and Ismael Ripoll, from Cybersecurity UPV Research Group,
found an integer underflow vulnerability in Grub2, a popular bootloader.
A local attacker can bypass the Grub2 authentication by inserting a
crafted input as username or password.

More information:
https://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html

For the oldstable distribution (wheezy), this problem has been fixed
in version 1.99-27+deb7u3.

For the stable distribution (jessie), this problem has been fixed in
version 2.02~beta2-22+deb8u1.

For the unstable distribution (sid), this problem has been fixed in
version 2.02~beta2-33.

We recommend that you upgrade your grub2 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Debian: DSA-3421-1: grub2 security update

December 16, 2015
Hector Marco and Ismael Ripoll, from Cybersecurity UPV Research Group, found an integer underflow vulnerability in Grub2, a popular bootloader

Summary

More information:
https://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html

For the oldstable distribution (wheezy), this problem has been fixed
in version 1.99-27+deb7u3.

For the stable distribution (jessie), this problem has been fixed in
version 2.02~beta2-22+deb8u1.

For the unstable distribution (sid), this problem has been fixed in
version 2.02~beta2-33.

We recommend that you upgrade your grub2 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Severity
Hector Marco and Ismael Ripoll, from Cybersecurity UPV Research Group,
found an integer underflow vulnerability in Grub2, a popular bootloader.
A local attacker can bypass the Grub2 authentication by inserting a
crafted input as username or password.

Related News

8.Locks HexConnections CodeGlobe Esm H320
1 - 2 min read
The latest release of Debian , one of the oldest and most trusted distributions within the Linux ecosystem, redefines security, stability, and
20.Lock AbstractDigital Circular Esm H320
1 - 2 min read
The Ubuntu security team has recently discovered and addressed multiple vulnerabilities in the Apache HTTP Server. The vulnerabilities affected
1.Penguin Landscape Esm H320
1 - 2 min read
A critical vulnerability was discovered in the Linux kernel's netfilter subsystem, specifically within the nf_tables component, posing potential
19.Laptop Bed Esm H320
2 - 3 min read
The release of Google Chrome 124 addresses four vulnerabilities, including a critical security flaw that can enable attackers to execute arbitrary
23.Tablet Connections Esm H320
2 - 3 min read
The release of Ubuntu 24.04 LTS , also known as Noble Numbat, brings various security enhancements and exciting new features . These improvements
4.Lock AbstractDigital Esm H320
2 - 3 min read
Tails 6.2 is a new Linux distribution release that expands its multilingual support and improves security features. The distribution is a
19.Laptop Bed Esm H320
2 - 3 min read
AlmaLinux 9.4 beta has been released and provides compelling reasons to consider it for desktop usage. While AlmaLinux is primarily known as a
32.Lock Code Circular Esm H320
2 - 3 min read
Linux admins and security practitioners face significant challenges in keeping their Linux systems secure amidst the constant threat of kernel bugs.
Sign Up