Vulnerability Monitor

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CVE-2005-0255

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.

Security Impact Summary

CVE-2005-0255 is a security vulnerability that . Impacting 3 products from mozilla, from mozilla, from mozilla organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2005, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2005-05-02T04:00:00.000

Last Modified

2025-04-03T01:03:51.193

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	1.0	Yes
Application	mozilla	mozilla	1.7.3	Yes
Application	mozilla	thunderbird	0.1	Yes
Application	mozilla	thunderbird	0.2	Yes
Application	mozilla	thunderbird	0.3	Yes
Application	mozilla	thunderbird	0.4	Yes
Application	mozilla	thunderbird	0.5	Yes
Application	mozilla	thunderbird	0.6	Yes
Application	mozilla	thunderbird	0.7	Yes
Application	mozilla	thunderbird	0.8	Yes
Application	mozilla	thunderbird	0.9	Yes
Application	mozilla	thunderbird	1.0	Yes

References

http://secunia.com/advisories/19823 ([email protected])
http://www.gentoo.org/security/en/glsa/glsa-200503-10.xml Patch, Vendor Advisory ([email protected])
http://www.gentoo.org/security/en/glsa/glsa-200503-30.xml Patch, Vendor Advisory ([email protected])
http://www.idefense.com/application/poi/display?id=200&type=vulnerabilities Patch, Vendor Advisory ([email protected])
http://www.mozilla.org/security/announce/mfsa2005-18.html Vendor Advisory ([email protected])
http://www.novell.com/linux/security/advisories/2005_16_mozilla_firefox.html Patch, Vendor Advisory ([email protected])
http://www.novell.com/linux/security/advisories/2006_04_25.html ([email protected])
http://www.redhat.com/support/errata/RHSA-2005-176.html ([email protected])
http://www.redhat.com/support/errata/RHSA-2005-277.html Patch, Vendor Advisory ([email protected])
http://www.redhat.com/support/errata/RHSA-2005-337.html Patch, Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/12659 ([email protected])
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100040 ([email protected])
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9111 ([email protected])
http://secunia.com/advisories/19823 (af854a3a-2127-422b-91ae-364da2661108)
http://www.gentoo.org/security/en/glsa/glsa-200503-10.xml Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.gentoo.org/security/en/glsa/glsa-200503-30.xml Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.idefense.com/application/poi/display?id=200&type=vulnerabilities Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.mozilla.org/security/announce/mfsa2005-18.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.novell.com/linux/security/advisories/2005_16_mozilla_firefox.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.novell.com/linux/security/advisories/2006_04_25.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2005-176.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2005-277.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2005-337.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/12659 (af854a3a-2127-422b-91ae-364da2661108)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100040 (af854a3a-2127-422b-91ae-364da2661108)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9111 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mozilla's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.