Vulnerability · Published Jul 30, 2020 · Assigned by redhat
CVE-2020-10713
High 8.2
In plain English
A high-severity security flaw in Grub. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | grub | 2.06-r0 | ALPINE-CVE-2020-10713 |
| Alpine:v3.21 | grub | 2.06-r0 | ALPINE-CVE-2020-10713 |
| Alpine:v3.22 | grub | 2.06-r0 | ALPINE-CVE-2020-10713 |
| Alpine:v3.23 | grub | 2.06-r0 | ALPINE-CVE-2020-10713 |
| Alpine:v3.24 | grub | 2.06-r0 | ALPINE-CVE-2020-10713 |
| Debian:12 | grub2 | 2.04-9 | DEBIAN-CVE-2020-10713 |
| Debian:13 | grub2 | 2.04-9 | DEBIAN-CVE-2020-10713 |
| Debian:14 | grub2 | 2.04-9 | DEBIAN-CVE-2020-10713 |
Affected products (as reported)
References
- DSA-4735 vendor-advisory, x_refsource_DEBIAN
- [oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities mailing-list, x_refsource_MLIST
- https://bugzilla.redhat.com/show_bug.cgi?id=1825243 x_refsource_MISC
- VU#174059 third-party-advisory, x_refsource_CERT-VN
- https://security.netapp.com/advisory/ntap-20200731-0008/ x_refsource_CONFIRM
- USN-4432-1 vendor-advisory, x_refsource_UBUNTU
- 20200804 GRUB2 Arbitrary Code Execution Vulnerability vendor-advisory, x_refsource_CISCO
- openSUSE-SU-2020:1169 vendor-advisory, x_refsource_SUSE
- openSUSE-SU-2020:1168 vendor-advisory, x_refsource_SUSE
- https://eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ x_refsource_MISC
- https://kb.vmware.com/s/article/80181 x_refsource_MISC
- https://cve.openeuler.org/#/CVEInfo/CVE-2020-10713 x_refsource_MISC
- GLSA-202104-05 vendor-advisory, x_refsource_GENTOO