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CVE Record

CVE-2017-5444: A buffer overflow vulnerability while parsing "application/http-index-format" format content when the heade...

A buffer overflow vulnerability while parsing "application/http-index-format" format content when the header contains improperly formatted data. This allows for an out-of-bounds read of data from memory. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2017-5444 is a Mozilla parsing flaw that could read data outside intended memory when malformed application/http-index-format content is processed. It affects older Firefox, Firefox ESR, and Thunderbird versions. The source bundle does not provide CVSS, CWE, or confirmed exploitation evidence.

Executive priority

Prioritize remediation where legacy Firefox or Thunderbird remains in production. Business urgency is lower if supported versions are already enforced, but unresolved legacy clients create avoidable memory-disclosure risk.

Technical view

The issue is described as a buffer overflow during parsing of application/http-index-format content with improperly formatted header data, resulting in out-of-bounds memory reads. Affected versions are Thunderbird before 52.1, Firefox ESR before 45.9 and 52.1, and Firefox before 53.

Likely exposure

Exposure is most likely on legacy endpoints, servers, or managed images still running affected Mozilla browser or mail clients, especially old ESR builds distributed through OS packages.

Exploitation context

The bundle marks CISA KEV as false and provides no cited evidence of active exploitation. Treat exploitation status as unconfirmed from these sources.

Researcher notes

Evidence is limited to the CVE summary and vendor advisories. The description names a buffer overflow, but the stated impact is out-of-bounds read. No CVSS vector, CWE, exploit maturity, or detailed trigger conditions are provided in the bundle.

Mitigation direction

  • Upgrade Firefox to 53 or later where applicable.
  • Upgrade Firefox ESR to 45.9, 52.1, or later supported ESR releases.
  • Upgrade Thunderbird to 52.1 or later.
  • Apply relevant Red Hat or Debian security updates where Mozilla packages are OS-managed.
  • Retire unsupported Mozilla versions from managed endpoints.

Validation and detection

  • Inventory Firefox, Firefox ESR, and Thunderbird versions across endpoints.
  • Confirm package versions against Mozilla, Red Hat, and Debian advisory guidance.
  • Check asset images and VDI templates for legacy ESR builds.
  • Verify vulnerability scanners map findings to the affected version thresholds.
Prepared
Confidence
medium
Sources
10

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

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CVE-2017-5444 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
10Source 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
MozillaThunderbirdunspecifiedListed
MozillaFirefox ESRunspecified, unspecifiedListed
MozillaFirefoxunspecifiedListed
Weakness

CWE details

No CWE listed

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