CVE-2023-36777
published 2023-09-12CVE-2023-36777: Microsoft Exchange Server Information Disclosure Vulnerability
PriorityP344medium5.7CVSS 3.1
AVAACLPRLUINSUCHINAN
EPSS
81.23%
99.6th percentile
Microsoft Exchange Server Information Disclosure Vulnerability
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | exchange_server | — | — |
| microsoft | exchange_server | — | — |
| microsoft | microsoft_exchange_server_2016_cumulative_update_23 | >= 15.01.0 < 15.01.2507.032 | 15.01.2507.032 |
| microsoft | microsoft_exchange_server_2019_cumulative_update_12 | >= 15.02.0 < 15.02.1118.037 | 15.02.1118.037 |
| microsoft | microsoft_exchange_server_2019_cumulative_update_13 | >= 15.02.0 < 15.02.1258.025 | 15.02.1258.025 |
| msrc | microsoft_exchange_server_2016_cumulative_update_23 | — | — |
| msrc | microsoft_exchange_server_2019_cumulative_update_12 | — | — |
| msrc | microsoft_exchange_server_2019_cumulative_update_13 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Attack vector is Adjacent Network (LAN), so detection should focus on internal network traffic to Exchange Server from authenticated but potentially malicious LAN-connected clients. ↗
- →Exploitation requires valid Exchange user credentials (low privilege); monitor for authenticated Exchange sessions from unusual or unexpected internal hosts attempting to access file content. ↗
- →The vulnerability results in file content disclosure; monitor Exchange Server logs for anomalous file read activity or unexpected data exfiltration patterns from authenticated low-privilege accounts. ↗
- →Microsoft rates this as 'Exploitation More Likely' in the latest software release; prioritize detection and patching on unpatched Exchange Servers that have not yet applied August 2023 security updates. ↗
- ·Protection requires the August 2023 Exchange security updates to be installed; systems already patched with August 2023 updates are not vulnerable. ↗
- ·As of the advisory publication, this vulnerability had not been publicly disclosed or exploited in the wild, but exploitation is rated 'More Likely' for the latest software release. ↗
CVSS provenance
nvdv3.15.7MEDIUMCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vendor_msrc5.7MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-2q84-994w-cvhj: Microsoft Exchange Server Information Disclosure Vulnerability
ghsa_unreviewed·2023-09-12
CVE-2023-36777 [MEDIUM] GHSA-2q84-994w-cvhj: Microsoft Exchange Server Information Disclosure Vulnerability
Microsoft Exchange Server Information Disclosure Vulnerability
Microsoft
Microsoft Exchange Server Information Disclosure Vulnerability
vendor_msrc·2023-09-12·CVSS 5.7
CVE-2023-36777 [MEDIUM] CWE-502 Microsoft Exchange Server Information Disclosure Vulnerability
Microsoft Exchange Server Information Disclosure Vulnerability
FAQ: According to the CVSS metric, the attack vector is adjacent (AV:A). What does that mean for this vulnerability?
An authenticated attacker could exploit this vulnerability with LAN access.
FAQ: What type of information could be disclosed by this vulnerability?
The type of information that could be disclosed if an attacker successfully exploited this vulnerability is file content.
FAQ: According to the CVSS metric, privileges required is low (PR:L). Does the attacker need to be in an authenticated role on the Exchange Server?
Yes, the attacker must be authenticated with LAN-access and have credentials for a valid Exchange user.
FAQ: What updates do I need to install to be protected from this vulnerability?
Customers need
No detection rules found.
No public exploits indexed.
Qualys
Microsoft and Adobe Patch Tuesday, September 2023 Security Update Review
blogs_qualys·2023-09-12
Microsoft and Adobe Patch Tuesday, September 2023 Security Update Review
## Table of Contents
Microsoft Patch Tuesday for September 2023
Adobe Patches for September 2023
Zero-day Vulnerability Patched in September Patch Tuesday Edition
Other Critical Severity Vulnerabilities Patched in September Patch Tuesday Edition
Other Microsoft Vulnerability Highlights
Microsoft Release Summary
Discover and Prioritize Vulnerabilities in Vulnerability Management, Detection & Response (VMDR)
Rapid Response with Patch Management (PM)
EVALUATE Vendor-Suggested Mitigation with Policy Compliance (PC)
EXECUTE Mitigation Using Qualys Custom Assessment and Remediation (CAR)
Qualys Monthly Webinar Series
Microsoft has released the Patch Tuesday edition for September. This month’s updates have addressed 66 security vulnerabilities (including Edge Chromium-based) in multip
Bleepingcomputer
Microsoft September 2023 Patch Tuesday fixes 2 zero-days, 59 flaws
blogs_bleepingcomputer·2023-09-12·CVSS 6.5
[MEDIUM] Microsoft September 2023 Patch Tuesday fixes 2 zero-days, 59 flaws
## Microsoft September 2023 Patch Tuesday fixes 2 zero-days, 59 flaws
## Lawrence Abrams
3 Security Feature Bypass Vulnerabilities
24 Remote Code Execution Vulnerabilities
9 Information Disclosure Vulnerabilities
3 Denial of Service Vulnerabilities
5 Spoofing Vulnerabilities
5 Edge - Chromium Vulnerabilities
The total count of 59 flaws does not include five Microsoft Edge (Chromium) vulnerabilities two non-Microsoft flaws in Electron and Autodesk.
To learn more about the non-security updates released today, you can review our dedicated articles on the new Windows 11 KB5030219 cumulative update and Windows 10 KB5030211 updates released.
## Two actively exploited zero-day vulnerabilities
This month's Patch Tuesday fixes two zero-day vulnerabilities, with both exploited in attacks
Tenable
Microsoft’s September 2023 Patch Tuesday Addresses 61 CVEs (CVE-2023-36761)
blogs_tenable·2023-09-12·CVSS 6.5
[MEDIUM] Microsoft’s September 2023 Patch Tuesday Addresses 61 CVEs (CVE-2023-36761)
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Qualys
Microsoft and Adobe Patch Tuesday, September 2023 Security Update Review | Qualys
blogs_qualys·2023-09-12
Microsoft and Adobe Patch Tuesday, September 2023 Security Update Review | Qualys
#### Table of Contents
- Microsoft Patch Tuesday for September 2023
- Adobe Patches for September 2023
- Zero-day Vulnerability Patched in September Patch Tuesday Edition
- Other Critical Severity Vulnerabilities Patched in September Patch Tuesday Edition
- Other Microsoft Vulnerability Highlights
- Microsoft Release Summary
- Discover and Prioritize Vulnerabilities in Vulnerability Management, Detection & Response (VMDR)
- Rapid Response with Patch Management (PM)
- EVALUATE Vendor-Suggested Mitigation with Policy Compliance (PC)
- EXECUTE Mitigation Using Qualys Custom Assessment and Remediation (CAR)
- Qualys Monthly Webinar Series
Microsoft has released the Patch Tuesday edition for September. This month’s updates have addressed 66 security vulnerabilities (including Edge Chromium-ba
2023-09-12
Published