CVE-2021-34720: cisco ios xr

csirt@kutim:~/threat-intel/cve/CVE-2021-34720

CVSS 8.6 · High EPSS 1,3%

Kerentanan Missing Reference to Active Allocated Resource pada cisco ios xr. Skor CVSS 3.1 8.6 (High) menurut NVD.

Deskripsi (NVD)

A vulnerability in the IP Service Level Agreements (IP SLA) responder and Two-Way Active Measurement Protocol (TWAMP) features of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause device packet memory to become exhausted or cause the IP SLA process to crash, resulting in a denial of service (DoS) condition. This vulnerability exists because socket creation failures are mishandled during the IP SLA and TWAMP processes. An attacker could exploit this vulnerability by sending specific IP SLA or TWAMP packets to an affected device. A successful exploit could allow the attacker to exhaust the packet memory, which will impact other processes, such as routing protocols, or crash the IP SLA process.

Rincian

Terbit di NVD: 9 September 2021
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 8.6 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-771: Missing Reference to Active Allocated Resource
EPSS (30 hari): 1,3% peluang dieksploitasi; lebih tinggi dari 69,4% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
cisco	ios xr	Semua versi sebelum 6.2.3
cisco	ios xr	Versi 6.3.0 hingga sebelum 6.3.2
cisco	ios xr	Versi 6.5.0 hingga sebelum 7.2.2

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipsla-ZA3SRrpP advisory vendor

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.