Linksys WRT54GL up to 4.30.18.006 upnp soap_action null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$0-$5k0.67

A vulnerability was found in Linksys WRT54GL up to 4.30.18.006 (Router Operating System). It has been declared as critical. Affected by this vulnerability is the function soap_action of the component upnp. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

A null pointer dereference vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A null pointer dereference in the soap_action function within the upnp binary can be triggered by an unauthenticated attacker via a malicious POST request invoking the AddPortMapping action.

The weakness was presented 01/10/2023. The advisory is shared at youtu.be. This vulnerability is known as CVE-2022-43972 since 10/28/2022. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/30/2023).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Productinfo

Type

Vendor

Name

License

  • commercial

CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 6.5
CNA Vector (Trellix): 🔒

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/28/2022 CVE reserved
01/10/2023 +74 days Advisory disclosed
01/10/2023 +0 days VulDB entry created
01/30/2023 +20 days VulDB last update

Sourcesinfo

Vendor: linksys.com

Advisory: youtu.be
Status: Not defined

CVE: CVE-2022-43972 (🔒)

Entryinfo

Created: 01/10/2023 08:57 AM
Updated: 01/30/2023 07:08 PM
Changes: 01/10/2023 08:57 AM (51), 01/30/2023 07:08 PM (11)
Complete: 🔍

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