PT-2021-20705 · Teamviewer · Teamviewer

Kdot · Published 2021-08-24 · Updated 2022-01-21 · CVE-2021-34858

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: TeamViewer (affected versions not specified)

Description: This issue allows remote attackers to execute arbitrary code on affected installations. User interaction is required, where the target must visit a malicious page or open a malicious file. The flaw exists within the parsing of TVS files due to the lack of proper validation of user-supplied data, resulting in a read past the end of an allocated structure. An attacker can leverage this to execute code in the context of the current process.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2021-34858

ZDI-21-1001

ZDI-21-1002

Affected Products

Teamviewer

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-34858 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-1002 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-1001 · Security Note
• https://community.teamviewer.com/English/discussion/117794/august-updates-security-patches/p1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34858 · Vendor Advisory
• https://t.me/cvenotify/25449 · Telegram Post