Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2021-29991

Quick assessment

Affected
Mozilla Firefox
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 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

AI Predicted 6.1 Difficulty: Moderate EPSS 0.89% · P56

Possible ATT&CK Techniques 1 AI

T1071.001 · Web Protocols
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-29991

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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: 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 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
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-29991

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-29991 (2)

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
Same vendor: Mozilla

V. Comments for CVE-2021-29991

No comments yet

Leave a comment