csirt@kutim:~/threat-intel/cve/CVE-2021-34781

Katalog CVE

CVSS 7.5 · High EPSS 1,4%

Kerentanan Improper Restriction of Operations within the Bounds of a Memory Buffer pada cisco firepower management center virtual appliance, cisco secure firewall threat defense +1 lainnya. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

A vulnerability in the processing of SSH connections for multi-instance deployments of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. This vulnerability is due to a lack of proper error handling when an SSH session fails to be established. An attacker could exploit this vulnerability by sending a high rate of crafted SSH connections to the instance. A successful exploit could allow the attacker to cause resource exhaustion, which causes a DoS condition on the affected device. The device must be manually reloaded to recover.

Rincian

Terbit di NVD
27 Oktober 2021
Terakhir diubah
11 Agustus 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-755: Improper Handling of Exceptional Conditions
EPSS (30 hari)
1,4% peluang dieksploitasi; lebih tinggi dari 71,8% CVE lain

Produk dan versi terdampak

VendorProdukVersi terdampak
cisco firepower management center virtual appliance Versi 6.3.0
cisco firepower management center virtual appliance Versi 6.4.0
cisco firepower management center virtual appliance Versi 6.4.0.13
cisco firepower management center virtual appliance Versi 6.5.0
cisco firepower management center virtual appliance Versi 6.6.0
cisco firepower management center virtual appliance Versi 6.7.0.3
cisco firepower management center virtual appliance Versi 6.7.1
cisco firepower management center virtual appliance Versi 7.0.0
cisco secure firewall threat defense Versi 6.3.0 hingga sebelum 6.4.0.13
cisco secure firewall threat defense Versi 6.5.0 hingga sebelum 6.6.5
cisco secure firewall threat defense Versi 6.7.0 hingga sebelum 6.7.0.3
cisco secure firewall threat defense Versi 7.0.0 hingga sebelum 7.0.1
cisco sourcefire defense center Versi 6.3.0
cisco sourcefire defense center Versi 6.4.0
cisco sourcefire defense center Versi 6.4.0.13
cisco sourcefire defense center Versi 6.5.0
cisco sourcefire defense center Versi 6.6.0
cisco sourcefire defense center Versi 6.7.0.3
cisco sourcefire defense center Versi 6.7.1
cisco sourcefire defense center Versi 7.0.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

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.