Vulnerability Details : CVE-2020-15707
Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.
Vulnerability category: OverflowExecute code
Exploit prediction scoring system (EPSS) score for CVE-2020-15707
Probability of exploitation activity in the next 30 days: 0.10%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 41 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-15707
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
4.4
|
MEDIUM | AV:L/AC:M/Au:N/C:P/I:P/A:P |
3.4
|
6.4
|
[email protected] |
|
6.4
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |
0.5
|
5.9
|
[email protected] |
|
5.7
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H |
0.5
|
5.2
|
[email protected] |
CWE ids for CVE-2020-15707
-
The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.Assigned by: [email protected] (Primary)
-
The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.Assigned by:
- [email protected] (Primary)
- [email protected] (Secondary)
References for CVE-2020-15707
-
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
Third Party Advisory
-
http://ubuntu.com/security/notices/USN-4432-1
Third Party Advisory
-
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2020/07/29/3
Mailing List;Third Party Advisory
-
https://www.debian.org/security/2020/dsa-4735
Third Party Advisory
-
https://access.redhat.com/security/vulnerabilities/grub2bootloader
Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
Mailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/202104-05
Third Party Advisory
-
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
Third Party Advisory
-
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
Issue Tracking;Vendor Advisory
-
https://security.netapp.com/advisory/ntap-20200731-0008/
Third Party Advisory
-
https://www.suse.com/support/kb/doc/?id=000019673
Third Party Advisory
-
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
Exploit;Third Party Advisory
-
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
Patch;Third Party Advisory;Vendor Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
Mailing List;Third Party Advisory
-
https://usn.ubuntu.com/4432-1/
Third Party Advisory
-
https://www.openwall.com/lists/oss-security/2020/07/29/3
Mailing List;Third Party Advisory
Products affected by CVE-2020-15707
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:enterprise_linux_atomic_host:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_server:11:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_server:15:*:*:*:*:*:*:*
- cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vmware_vsphere:*:*