CVE-2021-27291

Katalog CVE

CVSS 7.5 · High EPSS 3,9%

Kerentanan Inefficient Regular Expression Complexity pada pygments, debian linux +1 lainnya. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.

Rincian

Terbit di NVD

17 Maret 2021

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-1333: Inefficient Regular Expression Complexity

EPSS (30 hari)

3,9% peluang dieksploitasi; lebih tinggi dari 90,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14 patch · advisory pihak ketiga
• https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce exploit · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html mailing list · advisory pihak ketiga
• https://www.debian.org/security/2021/dsa-4878 advisory pihak ketiga
• https://www.debian.org/security/2021/dsa-4889 advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSJRFHALQ7E3U...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WSLD67LFGXOX2...