CVE-2021-29991
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I. Basic Information for CVE-2021-29991
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This allowed for a header splitting attack against servers using HTTP/3. This vulnerability affects Firefox < 91.0.1 and Thunderbird < 91.0.1.
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和Mozilla Thunderbird 存在安全漏洞，攻击者可利用该漏洞通过 Firefox/Thunderbird 的 HTTP/3
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 | Firefox | unspecified ~ 91.0.1 | - | |
| Mozilla | Thunderbird | unspecified ~ 91.0.1 | - |
II. Public POCs for CVE-2021-29991
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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- https://www.mozilla.org/security/advisories/mfsa2021-37/x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1724896x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-29991
Same Patch Batch · Mozilla · 2021-11-03 · 14 CVEs total
| CVE-2021-38502 | Mozilla Thunderbird 安全漏洞 | |
| CVE-2021-38501 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2021-38500 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2021-38499 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2021-38498 | Mozilla Firefox 资源管理错误漏洞 | |
| CVE-2021-38497 | Mozilla Firefox 访问控制错误漏洞 | |
| CVE-2021-38496 | Mozilla Firefox MessageTask 资源管理错误漏洞 | |
| CVE-2021-38495 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2021-38494 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2021-38493 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2021-38492 | Mozilla Firefox 输入验证错误漏洞 | |
| CVE-2021-38491 | Mozilla Firefox 权限许可和访问控制问题漏洞 | |
| CVE-2021-29993 | Mozilla Firefox 权限许可和访问控制问题漏洞 |
IV. Related Vulnerabilities
Same product: Firefox
- CVE-2026-8093
Memory safety bugs fixed in Thunderbird 150.0.2 - CVE-2026-8094
Other issue in the WebRTC component - CVE-2026-8092
Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thu - CVE-2026-8091
Incorrect boundary conditions in the Audio/Video: Playback c - CVE-2026-8090
Use-after-free in the DOM: Networking component
Same vendor: Mozilla
- CVE-2026-8093
Memory safety bugs fixed in Thunderbird 150.0.2 - CVE-2026-8094
Other issue in the WebRTC component - CVE-2026-8092
Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thu - CVE-2026-8091
Incorrect boundary conditions in the Audio/Video: Playback c - CVE-2026-8090
Use-after-free in the DOM: Networking component
V. Comments for CVE-2021-29991
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