CVE-2020-16969 (GCVE-0-2020-16969)

Vulnerability from cvelistv5 – Published: 2020-10-16 22:18 – Updated: 2024-08-04 13:45
VLAI?
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>
Severity ?
7.1 (High)
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
CWE
  • Information Disclosure
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Exchange Server 2019 Cumulative Update 6 Affected: 15.02.0 , < publication (custom)
    cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:*
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    Microsoft Microsoft Exchange Server 2016 Cumulative Update 17 Affected: 15.01.0 , < publication (custom)
    cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*
 Create a notification for this product.
    Microsoft Microsoft Exchange Server 2019 Cumulative Update 7 Affected: 15.02.0 , < publication (custom)
    cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*
 Create a notification for this product.
    Microsoft Microsoft Exchange Server 2016 Cumulative Update 18 Affected: 15.01.0 , < publication (custom)
    cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*
 Create a notification for this product.
    Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 Affected: 15.00.0 , < publication (custom)
    cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
 Create a notification for this product.
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  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.