What is CVE-2020-14308?

CVE-2020-14308 is a medium-severity vulnerability in Gnu Grub2, classified under Integer Overflow or Wraparound. CVSS score: 6.4/10. Published 2020-07-29.

How severe is CVE-2020-14308?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2020-14308 known to be exploited?

27 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Gnu Grub2

CVE-2020-14308

In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This leads the function to return invalid memory allocations which can be further used to cause possible integrity, confidentiality and availability impacts during the boot process.

Vulnerability class: Integer Overflow

EPSS: 0.004 (35.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Gnu Grub2
Opensuse Leap — versions 15.1, 15.2
N/a Grub — versions All grub2 versions before 2.06

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

References

secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-14308?: CVE-2020-14308 is a medium-severity vulnerability in Gnu Grub2, classified under Integer Overflow or Wraparound. CVSS score: 6.4/10. Published 2020-07-29.
How severe is CVE-2020-14308?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2020-14308 known to be exploited?: 27 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.