Multiple vulnerabilities in Microsoft Office
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2017-11939 CVE-2017-11935 CVE-2017-11934 |
| CWE-ID | CWE-200 CWE-119 CWE-125 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Microsoft Office Client/Desktop applications / Office applications Microsoft Office for Mac Client/Desktop applications / Office applications |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
Additionally Microsoft has released a defense in depth update to address Dynamic Update Exchange protocol (DDE) issues in all supported editions of Microsoft Word.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV170021
1) Information disclosure
EUVDB-ID: #VU9645
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-11939
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information.
An information disclosure vulnerability exists when Microsoft Outlook fails to enforce copy/paste permissions on DRM-protected emails. An attacker who successfully exploited the vulnerability could potentially extract plaintext content from DRM-protected draft emails.
The vulnerability should be exploited exploited along with another vulnerability to access the victim's Drafts folder, either locally on the victim's system or remotely via MAPI.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Office: 2016
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11939
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.
2) Buffer overflow
EUVDB-ID: #VU9646
Risk: High
CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-11935
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error when processing Microsoft Excel files. A remote unauthenticated attacker can create a specially crafted Excel file, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Office: 2016
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11935
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.
3) Out-of-bounds read
EUVDB-ID: #VU9647
Risk: Low
CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-11934
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists due to boundary error when processing PowerPoint files. A remote attacker can create a specially crafted PowerPoint file, trick the victim into opening it and obtain information and gain access to potentially sensitive information, stored in memory.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Office: 2013 - 2016
Microsoft Office for Mac: 2016
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11934
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.
