PT-2021-3194 · Unknown · Ua-Parser-Js

Ben Caller · Published 2021-03-17 · Updated 2021-05-25 · CVE-2021-27292

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions ua-parser-js versions 0.7.14 through 0.7.23

Description The issue is related to an uncontrolled resource consumption vulnerability in the ua-parser-js library. It can be exploited by a remote attacker to cause a denial of service. The vulnerability arises from a regular expression that is vulnerable to denial of service attacks. If an attacker sends a malicious User-Agent header, the library will get stuck processing it for an extended period.

Recommendations For versions 0.7.14 through 0.7.23, update to version 0.7.24 to resolve the issue. As a temporary workaround, consider restricting access to the User-Agent header to minimize the risk of exploitation.

Exploit

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2021-02889

CVE-2021-27292

GHSA-78CJ-FXPH-M83P

Affected Products

Ua-Parser-Js

References · 14

• 🔥 https://gist.github.com/b-c-ds/6941d80d6b4e694df4bc269493b7be76 · Exploit
• https://github.com/faisalman/ua-parser-js/commit/809439e20e273ce0d25c1d04e111dcf6011eb566 · Patch
• https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14 · Patch
• https://ubuntu.com/security/CVE-2021-27292 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27292 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-27292 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-27292 · Security Note
• https://bdu.fstec.ru/vul/2021-02889 · Security Note
• https://osv.dev/vulnerability/GHSA-78cj-fxph-m83p · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-27292 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-27292 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-27292 · Vendor Advisory
• https://snyk.io/vuln/SNYK-JS-UAPARSERJS-1072471 · Note
• https://t.me/cibsecurity/25019 · Telegram Post