PT-2023-4734 · Totolink · Totolink N200Re V5

Dmknght · Publicado 2023-09-03 · Atualizado 2024-05-17 · CVE-2023-4746

Positive Technologies (AI Summary)

CVSS v2.0

9.0

Alta

Vetor base

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions TOTOLINK N200RE V5 version 9.3.5u.6437 B20230519

Description The issue is related to the Validity check() function in the TOTOLINK N200RE V5 router's firmware. It involves the use of uncontrolled format strings when processing the % symbol, which can lead to format string vulnerabilities. This can be exploited remotely, allowing an attacker to execute arbitrary commands. The root cause is a format string issue that enables OS command injection by bypassing validation.

Recommendations For TOTOLINK N200RE V5 version 9.3.5u.6437 B20230519, as a temporary workaround, consider disabling the Validity check() function until a patch is available. Restrict access to the vulnerable function to minimize the risk of exploitation. Avoid using the % symbol in the affected function until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use of Externally-Controlled Format String

Enumeração de Fraquezas

CWE-134

Identificadores relacionados

BDU:2023-05168

CVE-2023-4746

Produtos afetados

Totolink N200Re V5

Referências · 10

• 🔥 https://gist.github.com/dmknght/8f3b6aa65e9d08f45b5236c6e9ab8d80 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-4746 · Nota de Segurança
• https://t.me/cibsecurity/69735 · Publicação no Telegram
• https://vuldb.com/?id.238635 · Nota
• https://vuldb.com/ru/?id.238635 · Nota
• https://osv.dev/vulnerability/CVE-2023-4746 · Aviso do Fabricante
• https://twitter.com/vuldb/status/1698443005391421765 · Publicação no Twitter
• https://vuldb.com/?ctiid.238635 · Nota
• https://bdu.fstec.ru/vul/2023-05168 · Nota de Segurança
• https://twitter.com/CVEnew/status/1698501649780613292 · Publicação no Twitter