PT-2020-2834 · Microsoft · Sharepoint Server

Published 2020-05-12 · Updated 2020-05-26 · CVE-2020-1102

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

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

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

Description The issue is related to a lack of restrictions on file uploads in Microsoft SharePoint Server and SharePoint Enterprise Server. This allows a remote attacker to execute arbitrary code. The vulnerability occurs when the software fails to check the source markup of an application package, enabling an attacker to run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.

Recommendations For Microsoft SharePoint Server, update to a version that includes a fix for this issue. For Microsoft SharePoint Enterprise Server, update to a version that includes a fix for this issue. As a temporary workaround, consider restricting file uploads to minimize the risk of exploitation.

Exploit

Fix

RCE

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

BDU:2020-02988

CVE-2020-1102

ZDI-20-648

Affected Products

Sharepoint Server

References · 10

• 🔥 https://github.com/DanielRuf/snyk-js-jquery-565129 · Exploit
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1102 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-1102 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-1102 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-20-648 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1102 · Security Note
• https://bdu.fstec.ru/vul/2020-02988 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/650718 · Security Note
• https://t.me/cibsecurity/12231 · Telegram Post
• https://t.me/cibsecurity/12232 · Telegram Post