Buffer Overflow Vulnerability in TP-Link TL-WR940N Router
CVE-2019-6989

8.8HIGH

Key Information:

Vendor

Tp-link
Status
Tl-wr940n Firmware
Vendor
CVE Published:
6 June 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 19%

What is CVE-2019-6989?

The TP-Link TL-WR940N router is susceptible to a stack-based buffer overflow due to inadequate bounds checking in the ipAddrDispose function. This vulnerability allows a remote authenticated attacker to craft and send malicious ICMP echo request packets, potentially leading to the overflow of a buffer. Such exploitation could facilitate the execution of arbitrary code on the affected system with elevated privileges, resulting in the compromise of the device's security.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-6989 - Proof of Concept

References

https://www.exploit-db.com/exploits/46678/
exploitx_refsource_EXPLOIT-DB
http://packetstormsecurity.com/files/152458/TP-LINK-TL-WR...
x_refsource_MISC

EPSS Score

19% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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