Asuswrt-Merlin up to 384.3 blocking.asp flag/mac/cat_id out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

A vulnerability classified as critical was found in Asuswrt-Merlin up to 384.3. This vulnerability affects an unknown part of the file blocking.asp. The manipulation of the argument flag/mac/cat_id as part of a POST Request leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.

The weakness was shared 11/21/2019. This vulnerability was named CVE-2018-8879 since 03/20/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

By approaching the search of inurl:blocking.asp it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 384.4 eliminates this vulnerability.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Asuswrt-Merlin 384.4

Timelineinfo

03/20/2018 🔍
11/21/2019 +611 days 🔍
11/22/2019 +1 days 🔍
02/26/2024 +1557 days 🔍

Sourcesinfo

Advisory: pagedout.institute
Status: Not defined

CVE: CVE-2018-8879 (🔍)

Entryinfo

Created: 11/22/2019 06:58
Updated: 02/26/2024 09:07
Changes: 11/22/2019 06:58 (38), 11/22/2019 07:03 (17), 02/26/2024 09:07 (4)
Complete: 🔍

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