CVE-2017-7794: Mozilla Firefox vulnerability

CVE-2017-7794: On Linux systems, if the content process is compromised, the sandbox broker will allow files to be truncate...

On Linux systems, if the content process is compromised, the sandbox broker will allow files to be truncated even though the sandbox explicitly only has read access to the local file system and no write permissions. Note: This attack only affects the Linux operating system. Other operating systems are not affected. This vulnerability affects Firefox < 55.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 16:12 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2017-7794 weakens Firefox's Linux sandbox. If an attacker already compromises a Firefox content process, the sandbox broker may let them truncate local files even though the sandbox should be read-only. The issue is limited to Linux and Firefox versions before 55. Exposure is likely limited to Linux endpoints or servers running Firefox versions earlier than 55. Non-Linux systems are not affected according to the source bundle. Treat this as a legacy-browser cleanup issue unless old Linux Firefox remains in use. It is not reported as actively exploited, but it undermines sandbox containment after browser compromise. Mitigation focus: Upgrade Firefox on Linux to version 55 or later.; Prefer a currently supported Firefox release from Mozilla.; Remove unsupported legacy Firefox builds from Linux systems..

Prepared: Jun 7, 2026, 06:44 UTC (UTC+00:00)

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

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 11, 2018, 21:00 UTC (UTC+00:00)

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

3Source links

CVSS and timeline data

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

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.mozilla.org/show_bug.cgi?id=1374281CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-18/CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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