#VU13786 Information disclosure in Mail, Calendar, and People in Windows 8.1 App Store - CVE-2018-8305

Vulnerability identifier: #VU13786

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-8305

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mail, Calendar, and People in Windows 8.1 App Store
Client/Desktop applications / Other client software

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists in Windows Mail Client due to improper processing of embedded URLs. A remote attacker can trick the victim into opening a specially crafted email, automatically initiate a connection to a remote server automatically, depending on the URL contained in the malicious email, and cause Windows Mail Client to fall back to initiating a web request to a remote server, disclosing the external IP of the user's system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mail, Calendar, and People in Windows 8.1 App Store: All versions

---

External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8305

---

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.