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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...

5.0 Medium

CVE-2005-0255 is a medium vulnerability (CVSS 5.0) in Mozilla Firefox, published February 28, 2005. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.29%, the 91st percentile. No source names a fixed version.

What does this mean?
Severity
5.0 MediumCVSS 2.0, NVD
Exploit chance
4.29%EPSS, 91st percentile
Exploitation
None knownNot on CISA’s or ENISA’s lists
Fixed in
No fix listedNo source names one

Description

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.

Exploit likelihood

4.29%Down 3.3 points since Feb 4, 2022
90%50%10%1%

Affected products

Affected packages

Affected packages
PackageAffectedFixed
firefox
Red Hat:enterprise_linux:4::as
From an advisory covering 16 CVEs
before 0:1.0.1-1.4.3
0:1.0.1-1.4.3
firefox
Red Hat:enterprise_linux:4::desktop
From an advisory covering 16 CVEs
before 0:1.0.1-1.4.3
0:1.0.1-1.4.3
firefox
Red Hat:enterprise_linux:4::es
From an advisory covering 16 CVEs
before 0:1.0.1-1.4.3
0:1.0.1-1.4.3
firefox
Red Hat:enterprise_linux:4::ws
From an advisory covering 16 CVEs
before 0:1.0.1-1.4.3
0:1.0.1-1.4.3
thunderbird
Red Hat:enterprise_linux:4::as
From an advisory covering 2 CVEs
before 0:1.0.2-1.4.1
0:1.0.2-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 2 CVEs
before 0:1.0.2-1.4.1
0:1.0.2-1.4.1
thunderbird
Red Hat:enterprise_linux:4::desktop
From an advisory covering 2 CVEs
before 0:1.0.2-1.4.1
0:1.0.2-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 2 CVEs
before 0:1.0.2-1.4.1
0:1.0.2-1.4.1
thunderbird
Red Hat:enterprise_linux:4::es
From an advisory covering 2 CVEs
before 0:1.0.2-1.4.1
0:1.0.2-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 2 CVEs
before 0:1.0.2-1.4.1
0:1.0.2-1.4.1
thunderbird
Red Hat:enterprise_linux:4::ws
From an advisory covering 2 CVEs
before 0:1.0.2-1.4.1
0:1.0.2-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 2 CVEs
before 0:1.0.2-1.4.1
0:1.0.2-1.4.1

What each source reports

NVD Score used5.0

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.

Record
CVE-2005-0255
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Updated
2026-11-02
CVE ListNo score

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.

Record
CVE-2005-0255
Updated
2026-11-02
EUVDEUVD-2005-0256No score

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.

Record
EUVD-2005-0256
Updated
2026-11-03
GitHub AdvisoriesGHSA-xg8v-4hxj-rcfgNo score

String handling functions in Mozilla 1.7.3, Firefox 1.0, and Thunderbird before 1.0.2, such as...

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.

Record
GHSA-xg8v-4hxj-rcfg
Updated
2026-11-02

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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