CVE-2018-8635
published 2018-12-12CVE-2018-8635: An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted authentication request to an…
PriorityP356high8.8CVSS 3.0
AVNACLPRLUINSUCHIHAH
EPSS
6.13%
92.6th percentile
An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted authentication request to an affected SharePoint server, aka "Microsoft SharePoint Server Elevation of Privilege Vulnerability." This affects Microsoft SharePoint Server, Microsoft SharePoint.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_sharepoint | — | — |
| microsoft | microsoft_sharepoint | — | — |
| microsoft | microsoft_sharepoint_server | — | — |
| microsoft | sharepoint_enterprise_server | — | — |
| microsoft | sharepoint_enterprise_server | — | — |
| microsoft | sharepoint_server | — | — |
| msrc | microsoft_sharepoint_enterprise_server_2013_service_pack_1 | — | — |
| msrc | microsoft_sharepoint_enterprise_server_2016 | — | — |
| msrc | microsoft_sharepoint_server_2010_service_pack_2 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Vulnerability is exploited via a server-side request forgery (SSRF) attack; monitor SharePoint server for unusual outbound requests originating from the SharePoint application pool account ↗
- →Exploitation requires an authenticated attacker to create a specially crafted page on the SharePoint server; monitor for suspicious page creation activity by authenticated users ↗
- →Successful exploitation results in code execution under the SharePoint application pool account identity; alert on unexpected process execution or network activity under the SharePoint app pool service account ↗
- ·Exploitation is assessed as 'Unlikely' for both latest and older software releases per Microsoft; no public exploits or in-the-wild exploitation reported at time of advisory ↗
- ·The vulnerability is triggered via a specially crafted authentication request; improper sanitization of authentication requests is the root cause, meaning detection should focus on anomalous authentication flows to SharePoint ↗
CVSS provenance
nvdv3.08.8HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
vendor_msrc8.8HIGH
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Microsoft
Microsoft SharePoint Server Elevation of Privilege Vulnerability
vendor_msrc·2018-12-11·CVSS 8.8
CVE-2018-8635 [HIGH] Microsoft SharePoint Server Elevation of Privilege Vulnerability
Microsoft SharePoint Server Elevation of Privilege Vulnerability
Description: An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted authentication request to an affected SharePoint server. An attacker who successfully exploited this vulnerability could execute malicious code on a vulnerable server in the context of the SharePoint application pool account.
To exploit this vulnerability, an authenticated attacker would need to create a page specifically designed to cause a server-side request. The attacker would then send a specially-crafted message to perform a server-side request forgery attack.
The update addresses the vulnerability by modifying how Microsoft SharePoint Server manages server authentication.
Microso
GHSA
GHSA-grqw-w3g8-7m4m: An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted authentication request
ghsa_unreviewed·2022-05-13
CVE-2018-8635 [HIGH] CWE-20 GHSA-grqw-w3g8-7m4m: An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted authentication request
An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted authentication request to an affected SharePoint server, aka "Microsoft SharePoint Server Elevation of Privilege Vulnerability." This affects Microsoft SharePoint Server, Microsoft SharePoint.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2018-12-12
Published