#VU18256 Improper restriction of XML external entity reference (XXE) in Microsoft Internet Explorer


Published: 2019-04-15

Vulnerability identifier: #VU18256

Vulnerability risk: Medium

CVSSv3.1: 4.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N/E:P/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Internet Explorer
Client/Desktop applications / Web browsers

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to gain access to sensitive information on the system.

The vulnerability exists due to improper restriction of XML external entity reference when processing .mht files. A remote attacker can trick the victim into opening a specially crafted .mht file and ready contents of arbitrary file on the system with privilege of the current user.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Microsoft Internet Explorer: 9 - 11

External links
http://hyp3rlinx.altervista.org/advisories/MICROSOFT-INTERNET-EXPLORER-v11-XML-EXTERNAL-ENTITY-INJECTION-0DAY.txt

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.


Latest bulletins with this vulnerability


XXE in Microsoft Internet Explorer