CVE-2020-16969
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C
Summary
<p>An information disclosure vulnerability exists in how Microsoft Exchange validates tokens when handling certain messages. An attacker who successfully exploited the vulnerability could use this to gain further information from a user.</p> <p>To exploit the vulnerability, an attacker could include specially crafted OWA messages that could be loaded, without warning or filtering, from the attacker-controlled URL. This callback vector provides an information disclosure tactic used in web beacons and other types of tracking systems.</p> <p>The security update corrects the way that Exchange handles these token validations.</p>
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 6 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 17 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 7 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 18 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 23 | 15.00.0 < publication | affected |
Weaknesses
- Information Disclosure
ADP Enrichment
CVE Program Container
Additional References
References
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