Buffer overflow in Fedoraproject Fedora
CVE-2023-40548
A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.
Vulnerability class: Integer Overflow
EPSS: 0.004 (35.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/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-2023-40548?
- CVE-2023-40548 is a high-severity vulnerability in Fedoraproject Fedora, classified under Integer Overflow or Wraparound. CVSS score: 7.4/10. Published 2024-01-29.
- How severe is CVE-2023-40548?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2023-40548 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.