Very High
CVE-2019-0604
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Description
URL
Type
CVE-2019-0604
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Description
A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package, aka ‘Microsoft SharePoint Remote Code Execution Vulnerability’. This CVE ID is unique from CVE-2019-0594.
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Ratings
-
Attacker ValueHigh
-
ExploitabilityMedium
Technical Analysis
A .NET deserialization vulnerability exists within SharePoint that can be exploited remotely. The vulnerability was actively being exploited in the wild around the May 2019 time frame. Per the ZDI Advisory the vulnerability is due to a lack of validation on user supplied data to an encoder class which can be leveraged to deserialize attacker-supplied data resulting in remote code execution.
Per the Microsoft advisory:
Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint.
A public PoC has been released.
The initial vulnerability is triggered via an HTTP POST request to /_layouts/15/Picker.aspx?PickerDialogType=
.
Ratings
-
Attacker ValueHigh
Technical Analysis
This made CISA’s list of most exploited vulns from 2016-2019—fairly notable since it’s a 2019 vulnerability and had less time to percolate than others. There are newer SharePoint vulnerabilities and exploits out now that may replace this one, but the generalized takeaway is that SharePoint is a highly attractive attack target with a number of public exploits and proofs-of-concept available for known vulns.
Ratings
-
Attacker ValueVery High
-
ExploitabilityVery High
Technical Analysis
This CVE made it into US-CERT’s “Top 10” bulletin released in May, 2020 – https://www.us-cert.gov/ncas/alerts/aa20-133a / https://web.archive.org/web/20200512161248/https://www.us-cert.gov/ncas/alerts/aa20-133a
- Vulnerable Products: Microsoft SharePoint
- Associated Malware: China Chopper
- Mitigation: Update affected Microsoft products with the latest security patches
CVSS V3 Severity and Metrics
General Information
Vendors
- Microsoft
Products
- Microsoft SharePoint Server,
- Microsoft SharePoint Foundation,
- Microsoft SharePoint Enterprise Server
References
Miscellaneous
Additional Info
Technical Analysis
Report as Exploited in the Wild
What do we mean by "exploited in the wild"?
By selecting this, you are verifying to the AttackerKB community that either you, or a reputable source (example: a security vendor or researcher), has observed an active attempt by attackers, or IOCs related, to exploit this vulnerability outside of a research environment.
A vulnerability should also be considered "exploited in the wild" if there is a publicly available PoC or exploit (example: in an exploitation framework like Metasploit).