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CVE-2020-14309

MEDIUM
6.7
CVSS Score
Published: July 30, 2020 at 12:49 PM UTC
Updated: June 17, 2026 at 02:54 AM UTC
3 products affected across 3 vendorsLeapGRUB2GRUB

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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.5%

Description

There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

GRUB2· Gnu
95%
v < 2.06
Affected range stops below 2.06, so it looks safe — our inference, not a vendor statement
Leap· openSUSEdrupal
95%
15.115.2
GRUB· Red Hat
60%
v < 2.06
Affected range stops below 2.06, so it looks safe — our inference, not a vendor statement

References (6)

Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1852022
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202104-05
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20200731-0008/
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4432-1/

CVSS

6.7MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-190CWE-787

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