Moderate
CVE-2020-13699
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Description
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Type
CVE-2020-13699
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Description
TeamViewer Desktop for Windows before 15.8.3 does not properly quote its custom URI handlers. A malicious website could launch TeamViewer with arbitrary parameters, as demonstrated by a teamviewer10: —play URL. An attacker could force a victim to send an NTLM authentication request and either relay the request or capture the hash for offline password cracking. This affects teamviewer10, teamviewer8, teamviewerapi, tvchat1, tvcontrol1, tvfiletransfer1, tvjoinv8, tvpresent1, tvsendfile1, tvsqcustomer1, tvsqsupport1, tvvideocall1, and tvvpn1. The issue is fixed in 8.0.258861, 9.0.258860, 10.0.258873, 11.0.258870, 12.0.258869, 13.2.36220, 14.2.56676, 14.7.48350, and 15.8.3.
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Ratings
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Attacker ValueMedium
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ExploitabilityMedium
Technical Analysis
There is a vulnerability in Teamviewer that will attempt to access a remote SMB site when a user visits a malicious website. Part of a smb handshake involves the exchange of credentials. The SMB handshake would contain the username and hashed password of the user. Attackers could redirect the connection with something like responder and/or store the hash for later cracking.
Affected versions are 8 -15.8.2; 15.8.3 is the first patched version. Administrators should patch immediately of attempt to disable SMB connections from local networks if possible.
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Technical Analysis
Report as Exploited in the Wild
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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).
