CVE-2023-40547
Shim HTTP Request Parsing Remote Code Execution
Description
A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.
INFO
Published Date :
Jan. 25, 2024, 4:15 p.m.
Last Modified :
Sept. 16, 2024, 7:16 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
6.0
Exploitability Score :
1.6
Public PoC/Exploit Available at Github
CVE-2023-40547 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-40547.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
A centralized repository of standalone security patches for open source libraries.
appsec backport cve devsecops fix hotfix open-source patch protection remediation seal security update upgrade vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-40547 vulnerability anywhere in the article.
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crowdstrike.com
August 2024 Patch Tuesday: Six Zero-Days and Six Critical Vulnerabilities Amid 85 CVEs
Microsoft has released security updates for 85 vulnerabilities in its August 2024 Patch Tuesday rollout. These include six actively exploited zero-days (CVE-2024-38213, CVE-2024-38193, CVE-2024-38189, ... Read more
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The Cyber Express
Microsoft Tackles 9 Zero-Day Exploits in August 2024 Patch Tuesday Update
Microsoft has released its August 2024 Patch Tuesday update, addressing multiple vulnerabilities across its software ecosystem. This month’s update features fixes for a total of 90 vulnerabilities, in ... Read more
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TheCyberThrone
Microsoft Patch Tuesday-August 2024
Microsoft patched 90 CVEs in its August 2024 Patch Tuesday release, with seven rated critical, 82 rated as important, and one rated as moderate.This includes updates for vulnerabilities in Microsoft O ... Read more
The following table lists the changes that have been made to the
CVE-2023-40547 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
Sep. 16, 2024
Action Type Old Value New Value Removed Reference Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/01/26/1 Removed Reference Red Hat, Inc. https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html -
CVE Modified by [email protected]
Jun. 10, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html [No types assigned] -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 30, 2024
Action Type Old Value New Value Added CWE Red Hat, Inc. CWE-787 Removed CWE Red Hat, Inc. CWE-125 -
CVE Modified by [email protected]
Apr. 29, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:2086 [No types assigned] -
CVE Modified by [email protected]
Apr. 25, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1902 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1903 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1959 [No types assigned] -
CVE Modified by [email protected]
Apr. 18, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1873 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1876 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1883 [No types assigned] -
CVE Modified by [email protected]
Apr. 16, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1834 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1835 [No types assigned] -
CVE Modified by [email protected]
Mar. 26, 2024
Action Type Old Value New Value Added CWE Red Hat, Inc. CWE-125 Removed CWE Red Hat, Inc. CWE-787 -
CVE Modified by [email protected]
Feb. 19, 2024
Action Type Old Value New Value Added CWE Red Hat, Inc. CWE-787 Removed CWE Red Hat, Inc. CWE-346 -
Modified Analysis by [email protected]
Feb. 08, 2024
Action Type Old Value New Value Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE NIST CWE-346 -
CVE Modified by [email protected]
Feb. 08, 2024
Action Type Old Value New Value Added CWE Red Hat, Inc. CWE-346 -
CVE Modified by [email protected]
Feb. 07, 2024
Action Type Old Value New Value Changed Description A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully. -
Initial Analysis by [email protected]
Feb. 02, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2024/01/26/1 No Types Assigned http://www.openwall.com/lists/oss-security/2024/01/26/1 Mailing List, Patch, Third Party Advisory Changed Reference Type https://access.redhat.com/security/cve/CVE-2023-40547 No Types Assigned https://access.redhat.com/security/cve/CVE-2023-40547 Vendor Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2234589 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2234589 Issue Tracking, Vendor Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:redhat:shim:*:*:*:*:*:*:*:* versions up to (excluding) 15.8 Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jan. 26, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/01/26/1 [No types assigned] -
CVE Received by [email protected]
Jan. 25, 2024
Action Type Old Value New Value Added Description A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. Added Reference Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2023-40547 [No types assigned] Added Reference Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2234589 [No types assigned] Added CVSS V3.1 Red Hat, Inc. AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-40547 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-40547
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.65 }} -1.87%
score
0.79613
percentile