CVE-2013-3900KEV · OVERDUECWE-347

Microsoft WinVerifyTrust function Remote Code Execution

Medium · published December 11, 2013

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 5.5. It is confirmed in active exploitation. It sits in the 98.8th percentile for exploit probability.

1566
days past CISA
deadline
CVSS v3.1
5.5
EPSS
45%
Percentile
98.8
In the wild
Confirmed
What it is

⚠️ Microsoft is dusting off a vulnerability from 2013! This one involves remote code execution through signed PE files, making it a sneaky little trip down memory lane. 🔍 Think of it like a restaurant that lets anyone change the recipe of a famous dish without actually changing its name. An attacker can tweak a signed executable just enough to serve up their malicious code while keeping the original seal of approval intact! 🍽️ An attacker could gain complete control of the system, installing programs, deleting data, or creating new accounts. This is particularly devastating if the target is logged in with administrative privileges, turning a single click into an open invitation for chaos! 😱

Put simply

Think of it like a restaurant that lets anyone change the recipe of a famous dish without actually changing its name. An attacker can tweak a signed executable just enough to serve up their malicious code while keeping the original seal of approval intact! 🍽️ The CVE-2013-3900 vulnerability arises from the WinVerifyTrust function mishandling signature verification for portable executable files, allowing an attacker to exploit this weakness via specially crafted files.

What to do

An attacker could gain complete control of the system, installing programs, deleting data, or creating new accounts. This is particularly devastating if the target is logged in with administrative privileges, turning a single click into an open invitation for chaos! 😱 To mitigate this risk, you should enable the CertPaddingCheck registry setting on your Windows devices. Ensure that your systems are set to the supported versions of Windows 10 or 11, and regularly monitor for any updates related to security practices. 🛡️ You've got this! Activate that registry key and keep your system secure. Together, we can keep the Internet a safer place! 💪✨

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.44647 · 98.8th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2013-12-11T05:55Z
KEV added
2022-01-10 · due 2022-07-10
Affected products (31)
ProductVersionsFixed in
microsoft/windows_10_1507all versions—
microsoft/windows_10_1607all versions—
microsoft/windows_10_1607all versions—
microsoft/windows_10_1809all versions—
microsoft/windows_10_1809all versions—
microsoft/windows_10_1809all versions—
microsoft/windows_10_1909all versions—
microsoft/windows_10_20h2all versions—
microsoft/windows_10_21h1all versions—
microsoft/windows_10_21h2all versions—
microsoft/windows_10_22h2all versions—
microsoft/windows_11_21h2all versions—
microsoft/windows_11_21h2all versions—
microsoft/windows_11_22h2all versions—
microsoft/windows_11_22h2all versions—
microsoft/windows_11_23h2all versions—
microsoft/windows_11_23h2all versions—
microsoft/windows_11_24h2all versions—
microsoft/windows_11_24h2all versions—
microsoft/windows_7all versions—
microsoft/windows_8.1all versions—
microsoft/windows_rt_8.1all versions—
microsoft/windows_server_2008all versions—
microsoft/windows_server_2008all versions—
microsoft/windows_server_2012all versions—
microsoft/windows_server_2012all versions—
microsoft/windows_server_2016all versions—
microsoft/windows_server_2019all versions—
microsoft/windows_server_2022all versions—
microsoft/windows_server_2022_23h2all versions—
microsoft/windows_server_2025all versions—
References (5)
EPSS history
Timeline
  • 10 JAN 00:00Z
    Added to CISA KEV — remediate by Jul 10
    kev
  • 11 DEC 00:00Z
    WinVerifyTrust Signature Validation Vulnerability
    cvelistv5