Out-of-bounds Read in Fedoraproject Fedora
CVE-2023-40549
An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (33.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Fedoraproject Fedora — versions 39
- Red Hat Enterprise Linux 7 — versions 0:15.8-3.el7, 0:15.8-1.el7
- Red Hat Enterprise Linux 8 — versions 0:15.8-4.el8_9
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 0:15.8-2.el8_2
- Red Hat Enterprise Linux 8.2 Telecommunications Update Service — versions 0:15.8-2.el8_2
- Red Hat Enterprise Linux 8.2 Update Services For Sap Solutions — versions 0:15.8-2.el8_2
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:15.8-2.el8_4
- Red Hat Enterprise Linux 8.4 Telecommunications Update Service — versions 0:15.8-2.el8_4
- Red Hat Enterprise Linux 8.4 Update Services For Sap Solutions — versions 0:15.8-2.el8_4
- Red Hat Enterprise Linux 8.6 Extended Update Support — versions 0:15.8-2.el8_6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-40549?
- CVE-2023-40549 is a medium-severity vulnerability in Fedoraproject Fedora, classified under Out-of-bounds Read. CVSS score: 6.2/10. Published 2024-01-29.
- How severe is CVE-2023-40549?
- Medium severity. CVSS v3 base score is 6.2 out of 10.
- Is CVE-2023-40549 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.