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CVE Record

CVE-2022-40468: Potential leak of left-over heap data if custom error page templates containing special non-standard variab...

Potential leak of left-over heap data if custom error page templates containing special non-standard variables are used. Tinyproxy commit 84f203f and earlier use uninitialized buffers in process_request() function.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-40468 is a potential information leak in Tinyproxy. Under a specific configuration, custom error page templates using special non-standard variables may expose leftover heap memory. The sources do not provide a CVSS score or confirm active exploitation.

Executive priority

Treat this as a targeted information disclosure risk. Prioritize exposed proxy services and environments handling sensitive traffic, but avoid emergency escalation unless local exposure is confirmed or vendor advisories indicate higher impact.

Technical view

Tinyproxy commit 84f203f and earlier reportedly used uninitialized buffers in process_request(). When custom error page templates include special non-standard variables, generated error responses may include residual heap data. Public references include the upstream issue, repository code reference, Gentoo advisory, and Debian LTS announcement.

Likely exposure

Exposure appears limited to Tinyproxy deployments at or before the referenced commit that use custom error page templates with special non-standard variables. The bundle does not provide complete affected version ranges or package names.

Exploitation context

The source bundle does not cite CISA KEV listing or any confirmed active exploitation. Public issue and distribution advisory references indicate disclosure and remediation attention, but exploit status remains unconfirmed from the provided evidence.

Researcher notes

Evidence supports an uninitialized-buffer information leak tied to template expansion behavior, but the bundle lacks CVSS, CWE, complete version mapping, and proof of active exploitation. Focus validation on configuration-dependent exposure and distribution-specific fixes.

Mitigation direction

  • Inventory Tinyproxy deployments and package versions.
  • Check vendor or distribution advisories for fixed Tinyproxy builds.
  • Apply available Tinyproxy updates from trusted package channels.
  • Review custom error templates for non-standard variables.
  • Remove risky custom templates if vendor guidance is unavailable.

Validation and detection

  • Confirm whether Tinyproxy is installed on internet-facing systems.
  • Identify instances using custom error page templates.
  • Compare installed versions against vendor advisory guidance.
  • Verify updates from Gentoo, Debian LTS, or your distribution are applied.
  • Document any remaining unsupported or source-built Tinyproxy deployments.
Prepared
Confidence
medium
Sources
8

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

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ATT&CK lookup starting points

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CVE-2022-40468 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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