VDB-124888 · CVE-2018-15376 · Qualys 316336

Cisco IOS on Cisco 800 Embedded Test Subsystem write-what-where condition

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Cisco IOS on Cisco 800. Impacted is an unknown function of the component Embedded Test Subsystem. Executing a manipulation can lead to write-what-where condition. This vulnerability appears as CVE-2018-15376. The attack requires local access. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco IOS on Cisco 800 (Router Operating System) (affected version unknown) and classified as critical. This vulnerability affects an unknown functionality of the component Embedded Test Subsystem. The manipulation with an unknown input leads to a write-what-where condition vulnerability. The CWE definition for the vulnerability is CWE-123. Any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the embedded test subsystem of Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers could allow an authenticated, local attacker to write arbitrary values to arbitrary locations in the memory space of an affected device. The vulnerability is due to the presence of certain test commands that were intended to be available only in internal development builds of the affected software. An attacker could exploit this vulnerability by using these commands on an affected device. A successful exploit could allow the attacker to write arbitrary values to arbitrary locations in the memory space of the affected device.

The bug was discovered 09/26/2018. The weakness was presented 10/05/2018 as cisco-sa-20180926-ir800-memwri as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2018-15376 since 08/17/2018. The attack needs to be approached locally. The successful exploitation needs a single authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316336 (Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Arbitrary Memory Write Vulnerabilities(cisco-sa-20180926-ir800-memwrite)).

Upgrading eliminates this vulnerability.

See VDB-124887 for similar entry. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Write-what-where condition
CWE: CWE-123 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/17/2018 🔍
09/26/2018 +40 days 🔍
10/05/2018 +8 days 🔍
10/05/2018 +0 days 🔍
10/06/2018 +1 days 🔍
03/30/2020 +541 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20180926-ir800-memwri
Status: Confirmed

CVE: CVE-2018-15376 (🔍)
GCVE (CVE): GCVE-0-2018-15376
GCVE (VulDB): GCVE-100-124888

OVAL: 🔍
See also: 🔍

Entryinfo

Created: 10/06/2018 11:05
Updated: 03/30/2020 15:05
Changes: 10/06/2018 11:05 (66), 03/30/2020 15:05 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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