Denial of service in Microsoft Outlook
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-35742 |
| CWE-ID | CWE-122 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Microsoft Outlook Client/Desktop applications / Office applications Microsoft Office Client/Desktop applications / Office applications Microsoft 365 Apps for Enterprise Client/Desktop applications / Office applications Microsoft Office LTSC Client/Desktop applications / Other client software |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Heap-based buffer overflow
EUVDB-ID: #VU66320
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2022-35742
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Outlook when handling MIME headers. A remote attacker can send a specially crafted email to the victim and trigger heap corruption every time the email is processed by the application.
Successful exploitation may result in a perform a persistent denial-of-service condition.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Outlook: 2013 Service Pack 1 - 2016
Microsoft Office LTSC: 32 bit editions - 64 bit editions
Microsoft Office: 2019
Microsoft 365 Apps for Enterprise: 32-bit Systems - 64-bit Systems
CPE2.3- cpe:2.3:a:microsoft:microsoft_outlook:2013_Service_Pack_1:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_outlook:2013_RT_Service_Pack_1:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_outlook:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office_ltsc:32:bit editions:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office_ltsc:64:bit editions:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_365_apps_for_enterprise:32-bit_Systems:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_365_apps_for_enterprise:64-bit_Systems:*:*:*:*:*:*:*
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-35742
https://www.zerodayinitiative.com/advisories/ZDI-22-1074/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website or open a file.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
