CVE-2022-29169

Katalog CVE

CVSS 7.5 · High EPSS 1,6%

Kerentanan Improper Input Validation pada bigbluebutton. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

BigBlueButton is an open source web conferencing system. Versions starting with 2.2 and prior to 2.3.19, 2.4.7, and 2.5.0-beta.2 are vulnerable to regular expression denial of service (ReDoS) attacks. By using specific a RegularExpression, an attacker can cause denial of service for the bbb-html5 service. The useragent library performs checking of device by parsing the input of User-Agent header and lets it go through lookupUserAgent() (alias of useragent.lookup() ). This function handles input by regexing and attackers can abuse that by providing some ReDos payload using `SmartWatch`. The maintainers removed `htmlclient/useragent` from versions 2.3.19, 2.4.7, and 2.5.0-beta.2. As a workaround, disable NginX forwarding the requests to the handler according to the directions in the GitHub Security Advisory.

Rincian

Terbit di NVD

1 Juni 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.5 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation
CWE-1333: Inefficient Regular Expression Complexity

EPSS (30 hari)

1,6% peluang dieksploitasi; lebih tinggi dari 74,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/bigbluebutton/bigbluebutton/pull/14886 patch · advisory pihak ketiga
• https://github.com/bigbluebutton/bigbluebutton/pull/14896 patch · advisory pihak ketiga
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rwrv-p665-4vwp mitigasi · patch · advisory pihak ketiga