LiveActive security incident?Get immediate response
CVE Record

CVE-2017-7828: A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object...

A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object has been freed while still in use. This results in a potentially exploitable crash during these operations. This vulnerability affects Firefox < 57, Firefox ESR < 52.5, and Thunderbird < 52.5.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This is a legacy Mozilla client vulnerability. Older Firefox, Firefox ESR, and Thunderbird versions can crash in a way Mozilla described as potentially exploitable when layout is flushed and resized after a freed PresShell object is reused.

Executive priority

Prioritize remediation where legacy Mozilla clients remain in production. This is old, but the affected software is user-facing and handles web or email content, making unpatched endpoints a meaningful risk.

Technical view

CVE-2017-7828 is a use-after-free in Mozilla layout handling involving the PresShell object during layout flushing and resizing. The published affected ranges are Firefox before 57, Firefox ESR before 52.5, and Thunderbird before 52.5.

Likely exposure

Exposure is most likely on endpoints still running Firefox below 57, Firefox ESR below 52.5, or Thunderbird below 52.5, especially where legacy operating-system packages remain installed.

Exploitation context

The source bundle says the crash is potentially exploitable, but it does not provide exploit details or confirm active exploitation. CISA KEV status is false in the provided data.

Researcher notes

The provided data lacks CVSS, CWE, and exploitability proof beyond Mozilla's potentially exploitable crash language. Treat this as a memory-safety exposure in obsolete Mozilla client versions and validate strictly by installed version or vendor package advisory state.

Mitigation direction

  • Upgrade Firefox to version 57 or later.
  • Upgrade Firefox ESR to version 52.5 or later.
  • Upgrade Thunderbird to version 52.5 or later.
  • Apply applicable Debian or Red Hat security updates where those packages are managed by the OS.
  • Check current Mozilla and distribution guidance for any unsupported legacy deployments.

Validation and detection

  • Inventory endpoint Firefox, Firefox ESR, and Thunderbird versions.
  • Confirm no installed Mozilla client is below the fixed versions listed for this CVE.
  • Check Linux package manager advisories for applied Debian or Red Hat updates.
  • Review vulnerability scanner results for CVE-2017-7828 and verify remediation evidence.
Prepared
Confidence
medium
Sources
11

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.

cve · low confidence lookup

CVE-2017-7828 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
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
13Source 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
MozillaFirefoxunspecifiedListed
MozillaFirefox ESRunspecifiedListed
MozillaThunderbirdunspecifiedListed
Weakness

CWE details

No CWE listed

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