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CVE-2023-0163

Mozilla Convict vulnerability

8.4 HIGHPublic exploitEPSS 0.27%
  1. Published26 Nov 2024

Description

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability in Mozilla Convict. This allows an attacker to inject attributes that are used in other components, or to override existing attributes with ones that have incompatible type, which may lead to a crash. The main use case of Convict is for handling server-side configurations written by the admins owning the servers, and not random users. So it's unlikely that an admin would deliberately sabotage their own server. Still, a situation can happen where an admin not knowledgeable about JavaScript could be tricked by an attacker into writing the malicious JavaScript code into some config files. This issue affects Convict: before 6.2.4.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Mozilla Convict< 6.2.4

Remediation

Fixed in
Mozilla Convict≥ 6.2.4

References

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Frequently asked

Is CVE-2023-0163 being actively exploited?

CVE-2023-0163 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.27%.

How severe is CVE-2023-0163?

CVE-2023-0163 has a CVSS 3.1 base score of 8.4, rated high. EPSS estimates a 0.27% probability of exploitation.

Which products are affected by CVE-2023-0163?

Affected products include Mozilla Convict.

How do I fix CVE-2023-0163?

Upgrade affected software to a fixed version, for example Mozilla Convict 6.2.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-0163 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.