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

Summaryinfo

A vulnerability labeled as critical has been found in Asuswrt-Merlin up to 384.3. This affects an unknown function of the file blocking.asp. Executing a manipulation of the argument flag/mac/cat_id as part of POST Request can lead to out-of-bounds write. The identification of this vulnerability is CVE-2018-8879. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

Physical: No
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 (🔍)
GCVE (CVE): GCVE-0-2018-8879
GCVE (VulDB): GCVE-100-146044

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: 🔍
Cache ID: 216::103

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