CVE-2023-39969
Microsoft Authenticode Malleable Signature Verification
Description
uthenticode is a small cross-platform library for partially verifying Authenticode digital signatures. Version 1.0.9 of uthenticode hashed the entire file rather than hashing sections by virtual address, in violation of the Authenticode specification. As a result, an attacker could modify code within a binary without changing its Authenticode hash, making it appear valid from uthenticode's perspective. Versions of uthenticode prior to 1.0.9 are not vulnerable to this attack, nor are versions in the 2.x series. By design, uthenticode does not perform full-chain validation. However, the malleability of signature verification introduced in 1.0.9 was an unintended oversight. The 2.x series addresses the vulnerability. Versions prior to 1.0.9 are also not vulnerable, but users are encouraged to upgrade rather than downgrade. There are no workarounds to this vulnerability.
INFO
Published Date :
Aug. 9, 2023, 4:15 p.m.
Last Modified :
Aug. 16, 2023, 5:12 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
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-2023-39969.
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).
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The following list is the news that have been mention
CVE-2023-39969 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-39969 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]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Aug. 16, 2023
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 https://github.com/trailofbits/uthenticode/commit/8670b7bb9154d79c276483dcb7c9e9fd5e66455b No Types Assigned https://github.com/trailofbits/uthenticode/commit/8670b7bb9154d79c276483dcb7c9e9fd5e66455b Patch Changed Reference Type https://github.com/trailofbits/uthenticode/pull/84 No Types Assigned https://github.com/trailofbits/uthenticode/pull/84 Patch Changed Reference Type https://github.com/trailofbits/uthenticode/security/advisories/GHSA-rc7g-99x7-4p9g No Types Assigned https://github.com/trailofbits/uthenticode/security/advisories/GHSA-rc7g-99x7-4p9g Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:trailofbits:uthenticode:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.9
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-39969 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-2023-39969
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.17 }} 0.02%
score
0.54004
percentile