6.4

CVE-2020-15707

Exploit

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.

Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Gnu ≫ Grub2 Version <= 2.04
Redhat ≫ Enterprise Linux Version7.0
Redhat ≫ Enterprise Linux Version8.0
Microsoft ≫ Windows 10 Version-
Microsoft ≫ Windows 10 Version1607
Microsoft ≫ Windows 10 Version1709
Microsoft ≫ Windows 10 Version1803
Microsoft ≫ Windows 10 Version1809
Microsoft ≫ Windows 10 Version1903
Microsoft ≫ Windows 10 Version1909
Microsoft ≫ Windows 10 Version2004
Microsoft ≫ Windows 8.1 Version-
Microsoft ≫ Windows Rt 8.1 Version-
Microsoft ≫ Windows Server 2016 Version1903
Microsoft ≫ Windows Server 2016 Version1909
Microsoft ≫ Windows Server 2016 Version2004
Canonical ≫ Ubuntu Linux Version14.04 SwEditionesm
Canonical ≫ Ubuntu Linux Version16.04 SwEditionesm
Canonical ≫ Ubuntu Linux Version18.04 SwEditionlts
Canonical ≫ Ubuntu Linux Version20.04 SwEditionlts
Debian ≫ Debian Linux Version10.0
Opensuse ≫ Leap Version15.1
Opensuse ≫ Leap Version15.2
Netapp ≫ Active Iq Unified Manager SwPlatformvmware_vsphere Version >= 9.5
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.04% 0.104
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 6.4 0.5 5.9
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 4.4 3.4 6.4
AV:L/AC:M/Au:N/C:P/I:P/A:P
security@ubuntu.com 5.7 0.5 5.2
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
CWE-190 Integer Overflow or Wraparound

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 occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that 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 operating concurrently.

https://usn.ubuntu.com/4432-1/
Third Party Advisory