CVE-2020-10713
An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.2 HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 1.71% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- gnu/grub2 · debian/debian linux · opensuse/leap · vmware/photon os
- Source
- secalert@redhat.com
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/29/3Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1825243Issue Tracking, Third Party Advisory
- https://cve.openeuler.org/#/CVEInfo/CVE-2020-10713Broken Link
- https://eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/Technical Description, Third Party Advisory
- https://kb.vmware.com/s/article/80181Third Party Advisory
- https://security.gentoo.org/glsa/202104-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200731-0008/Third Party Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-grub2-code-exec-xLePCAPYThird Party Advisory
- https://usn.ubuntu.com/4432-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4735Third Party Advisory
- https://www.kb.cert.org/vuls/id/174059Third Party Advisory, US Government Resource
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/29/3Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1825243Issue Tracking, Third Party Advisory
- https://cve.openeuler.org/#/CVEInfo/CVE-2020-10713Broken Link
- https://eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/Technical Description, Third Party Advisory
- https://kb.vmware.com/s/article/80181Third Party Advisory
- https://security.gentoo.org/glsa/202104-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200731-0008/Third Party Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-grub2-code-exec-xLePCAPYThird Party Advisory
- https://usn.ubuntu.com/4432-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4735Third Party Advisory
- https://www.kb.cert.org/vuls/id/174059Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.