CVEvulnerability

CVE-2021-1495

5.3 MEDIUM Published 2021-04-29 Modified 2026-08-11 Official page ↗
Status
Modified
Published
2021-04-29
Last modified
2026-08-11
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.8 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
Weaknesses
CWE-755

Description

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.

Affected configurations

• cisco secure firewall threat defense (< 6.4.0.12) • cisco secure firewall threat defense (>= 6.5.0 < 6.6.4) • cisco secure firewall threat defense (>= 6.7.0 < 6.7.0.2) • cisco ios xe (>= 16.12 < 16.12.5) • snort snort (< 2.9.17.1) • cisco ios xe (>= 17.1 < 17.3.3) • cisco ios xe (>= 17.4 < 17.4.1)

Related

Weakness · CWE (1)

  • CWE-755 Improper Handling of Exceptional Conditions weakness

References