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CVE Record

CVE-2005-0255: String handling functions in Mozilla 1.7.3, Firefox 1.0, and Thunderbird before 1.0.2, such as the nsTSubst...

String handling functions in Mozilla 1.7.3, Firefox 1.0, and Thunderbird before 1.0.2, such as the nsTSubstring_CharT::Replace function, do not properly check the return values of other functions that resize the string, which allows remote attackers to cause a denial of service and possibly execute arbitrary code by forcing an out-of-memory state that causes a reallocation to fail and return a pointer to a fixed address, which leads to heap corruption.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This is a legacy Mozilla memory-corruption issue. A remote attacker could make affected browser or mail clients run out of memory, causing a crash and possibly code execution. Business urgency is mainly for organizations with very old Mozilla, Firefox, or Thunderbird installations still present in labs, kiosks, archives, or unsupported desktops. Exposure is likely limited to legacy endpoints or old Linux distribution packages that still include the affected Mozilla-family versions. The source bundle does not show current mainstream products affected. Treat as a legacy hygiene issue unless affected clients are still deployed. Prioritize discovery and retirement over emergency response because no source in the bundle confirms active exploitation. Mitigation focus: Inventory systems for Mozilla 1.7.3, Firefox 1.0, and Thunderbird before 1.0.2.; Upgrade or remove affected legacy Mozilla-family software using vendor advisory guidance.; Retire unsupported operating system images that still package these versions..

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Potential ATT&CK relevance

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CVE-2005-0255 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
3Source 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

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