PT-2021-4693 · Microsoft · Exchange Server

Nicolas Joly · Published 2021-10-12 · Updated 2023-08-01 · CVE-2021-34453

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Microsoft Exchange Server (affected versions not specified)

Description The issue is related to insufficient input validation in Microsoft Exchange Server, which can be exploited by a remote attacker to cause a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2021-05390

CVE-2021-34453

Affected Products

Exchange Server

References · 9

• https://bdu.fstec.ru/vul/2021-05390 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34453 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34453 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34453 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34453 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34453 · Vendor Advisory
• https://cybersecurity-help.cz/vdb/SB2021101214 · Note
• https://t.me/avleonovcom/922 · Telegram Post
• https://t.me/cibsecurity/30486 · Telegram Post