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I. Basic Information for CVE-2025-1942
Vulnerability Information

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Vulnerability Title
Disclosure of uninitialized memory when .toUpperCase() causes string to get longer
Source: NVD (National Vulnerability Database)
Vulnerability Description
When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string. This vulnerability was fixed in Firefox 136 and Thunderbird 136.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mozilla Firefox和Mozilla Thunderbird 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox和Mozilla Thunderbird都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Firefox 136之前版本和Mozilla Thunderbird 136之前版本存在安全漏洞,该漏洞源于未初始化内存使用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
MozillaFirefox 136 ~ * -
MozillaThunderbird 136 ~ * -
II. Public POCs for CVE-2025-1942
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III. Intelligence Information for CVE-2025-1942
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IV. Related Vulnerabilities
V. Comments for CVE-2025-1942

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