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CVE-2021-43529

Quick assessment

Affected
Mozilla Thunderbird
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Thunderbird是美国Mozilla基金会的一套从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 Thunderbird 存在缓冲区错误漏洞，该漏洞源于当在Mozilla Thunderbird中使用Mozilla NSS库中处理der编码的DSA或RSA-PSS签名时，由于边界错误而存在该漏洞。攻击者可利用该漏洞发送带有CMS、S MIME、PKCS中编码的签名的特别制作的电子

AI Predicted 8.1 Difficulty: Easy EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-43529

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Thunderbird versions prior to 91.3.0 are vulnerable to the heap overflow described in CVE-2021-43527 when processing S/MIME messages. Thunderbird versions 91.3.0 and later will not call the vulnerable code when processing S/MIME messages that contain certificates with DER-encoded DSA or RSA-PSS signatures.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Thunderbird 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Thunderbird是美国Mozilla基金会的一套从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 Thunderbird 存在缓冲区错误漏洞，该漏洞源于当在Mozilla Thunderbird中使用Mozilla NSS库中处理der编码的DSA或RSA-PSS签名时，由于边界错误而存在该漏洞。攻击者可利用该漏洞发送带有CMS、S MIME、PKCS中编码的签名的特别制作的电子
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

Vendor Product Affected Versions CPE Subscribe
Mozilla Thunderbird unspecified ~ 91.3.0 -

II. Public POCs for CVE-2021-43529

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III. Intelligence Information for CVE-2021-43529

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Vendor Advisories for CVE-2021-43529 (1)

Same Patch Batch · Mozilla · 2023-02-16 · 5 CVEs total

CVE-2019-17003 Mozilla Firefox 跨站脚本漏洞
CVE-2020-12413 Mozilla Firefox 信息泄露漏洞
CVE-2020-6817 Python Bleach 安全漏洞
CVE-2021-23980 Python Bleach 跨站脚本漏洞

IV. Related Vulnerabilities

Same product: Thunderbird
Same vendor: Mozilla

V. Comments for CVE-2021-43529

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