CVE-2021-34858
This vulnerability allows remote attackers to execute arbitrary code on affected installations of TeamViewer.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.76%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of TeamViewer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of TVS files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated structure. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-13606.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 3.76% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- teamviewer/teamviewer
- Source
- zdi-disclosures@trendmicro.com
References
- https://community.teamviewer.com/English/discussion/117794/august-updates-security-patches/p1Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-1001/Third Party Advisory, VDB Entry
- https://community.teamviewer.com/English/discussion/117794/august-updates-security-patches/p1Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-1001/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.