PT-2021-7035 · Tp Link · Tp-Link Archer C90

Pedrib1337 + 3 · Published 2021-09-16 · Updated 2022-01-27 · CVE-2021-35003

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions TP-Link Archer C90 version 1.0.6 Build 20200114 rel.73164(5553)

Description This issue allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer C90 routers. Authentication is not required to exploit this issue. The specific flaw exists within the handling of DNS responses. A crafted DNS message can trigger an overflow of a fixed-length, stack-based buffer. An attacker can leverage this issue to execute code in the context of root.

Recommendations For TP-Link Archer C90 version 1.0.6 Build 20200114 rel.73164(5553), as a temporary workaround, consider restricting access to the DNS response handling mechanism until a patch is available. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2022-03014

CVE-2021-35003

ZDI-22-080

Affected Products

Tp-Link Archer C90

References · 6

• https://zerodayinitiative.com/advisories/ZDI-22-080 · Security Note
• https://osv.dev/vulnerability/CVE-2021-35003 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-03014 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-35003 · Security Note
• https://cybersecurity-help.cz/vdb/SB2022011806 · Note
• https://t.me/cibsecurity/36028 · Telegram Post