CVE-2020-12397
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 68.8.0之前版本中存在安全漏洞。攻击者可通过编码From email头中的Unicode空格字符利用该漏洞伪造发件人邮箱地址。
Possible ATT&CK Techniques 1 AI
T1566.001 · Spearphishing Attachment
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I. Basic Information for CVE-2020-12397
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. This vulnerability affects Thunderbird < 68.8.0.
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 访问控制错误漏洞
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 68.8.0之前版本中存在安全漏洞。攻击者可通过编码From email头中的Unicode空格字符利用该漏洞伪造发件人邮箱地址。
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 ~ 68.8.0 | - |
|
II. Public POCs for CVE-2020-12397
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-12397 (4)
-
https://security.gentoo.org/glsa/202005-03 x_refsource_MISC
-
https://www.mozilla.org/security/advisories/mfsa2020-18/ x_refsource_MISC
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https://bugzilla.mozilla.org/show_bug.cgi?id=1617370 x_refsource_MISC
-
IV. Related Vulnerabilities
Same product: Thunderbird
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CVE-2026-103500
Heap buffer overflow opening large email -
CVE-2026-100820
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Other issue in the JavaScript: WebAssembly component -
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Invalid pointer in the JavaScript Engine: JIT component
Same vendor: Mozilla
-
CVE-2026-103500
Heap buffer overflow opening large email -
CVE-2026-100832
Use-after-free in the Graphics: Canvas2D component -
CVE-2026-100830
Mitigation bypass in the DOM: Navigation component -
CVE-2026-100831
Use-after-free in the DOM: UI Events & Focus Handling compon -
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Mitigation bypass in the DOM: Security component
V. Comments for CVE-2020-12397
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