LiveActive security incident?Get immediate response
CVE Record

CVE-2018-4055: A local privilege escalation vulnerability exists in the install helper tool of the Mac OS X version of Pix...

A local privilege escalation vulnerability exists in the install helper tool of the Mac OS X version of Pixar Renderman, version 22.2.0. A user with local access can use this vulnerability to read any root file from the file system. An attacker would need local access to the machine to successfully exploit this flaw.

HighCVSS 7.1Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-4055 lets someone with local access to a Mac running Pixar Renderman 22.2.0 read files that should only be readable by root. The main business risk is exposure of secrets, credentials, project data, or configuration files on affected workstations.

Executive priority

Treat this as a high-priority workstation exposure issue, not an internet-wide emergency. Prioritize Macs running Renderman 22.2.0 where multiple users, contractors, or less-trusted accounts have local access.

Technical view

The vulnerability is in the Mac OS X install helper tool for Pixar Renderman 22.2.0. The CVSS 3.0 score is 7.1, with local attack vector, low complexity, no privileges, no user interaction, changed scope, and high confidentiality impact.

Likely exposure

Exposure appears limited to Mac OS X systems with Pixar Renderman 22.2.0 installed, especially shared workstations or build/render systems where untrusted local users may have accounts. The sources do not indicate remote exposure.

Exploitation context

The provided sources say exploitation requires local access. There is no KEV listing and no provided source claiming active exploitation. The described impact is unauthorized reading of root-protected files, not integrity or availability loss.

Researcher notes

The source bundle identifies confidentiality-only impact through root file reads from a local helper. It does not provide a CWE, patch version, mitigation text, or active exploitation evidence. Keep findings scoped to Mac OS X Renderman 22.2.0.

Mitigation direction

  • Inventory Mac OS X systems for Pixar Renderman 22.2.0 installations.
  • Check Pixar or RenderMan guidance for fixed versions or supported remediation.
  • Remove the affected version where it is no longer operationally required.
  • Limit local account access on affected Macs until remediation is complete.
  • Review sensitive files that could expose credentials or project secrets.

Validation and detection

  • Confirm whether each Mac has Pixar Renderman 22.2.0 installed.
  • Verify the affected install helper is removed, updated, or remediated per vendor guidance.
  • Check whether affected systems allow non-admin local users.
  • Review logs or EDR telemetry for unusual protected-file access.
  • Document remaining exceptions and compensating controls.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Privilege behavior lookup

The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-4055 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.1CVSS 3.0HighCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N2.54Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

7.1High
CVSS 3.0 vector shape for CVE-2018-4055Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
TalosPixar RendermanRenderman 22.2.0 for Mac OS XListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.