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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2020-5243— Denial of Service in uap-core when processing crafted User-Agent strings

Quick assessment

Affected
ua-parser uap-core
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.

uap-core 0.7.3之前版本中存在输入验证错误漏洞，该漏洞源于程序没有正确验证User-Agent字符串。远程攻击者可借助特制HTTP User-Agent标头请求利用该漏洞导致拒绝服务。

CVSS 5.7 · Medium EPSS 2.26% · P82

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2020-5243

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Denial of Service in uap-core when processing crafted User-Agent strings
Source: CVE Program / CVE List V5
Vulnerability Description
uap-core before 0.7.3 is vulnerable to a denial of service attack when processing crafted User-Agent strings. Some regexes are vulnerable to regular expression denial of service (REDoS) due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings. This has been patched in uap-core 0.7.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
uap-core 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
uap-core 0.7.3之前版本中存在输入验证错误漏洞，该漏洞源于程序没有正确验证User-Agent字符串。远程攻击者可借助特制HTTP User-Agent标头请求利用该漏洞导致拒绝服务。
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
ua-parser uap-core < 0.7.3 -

II. Public POCs for CVE-2020-5243

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2020-5243

请登录查看更多情报信息。

Patches & Fixes for CVE-2020-5243 (1)

Vendor Advisories for CVE-2020-5243 (1)

IV. Related Vulnerabilities

Same product: uap-core
Same vendor: ua-parser
Same weakness: CWE-20

V. Comments for CVE-2020-5243

No comments yet

Leave a comment