CVE-2021-1223 : Multiple Cisco products are affected by a vulnerability in the Snort detection e

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 an HTTP range header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

Published 2021-01-13 22:15:20

Updated 2024-11-26 16:09:02

Source Cisco Systems, Inc.

View at NVD, CVE.org

Products affected by CVE-2021-1223

Cisco » Ios Xe
Versions before (<) 17.4.1
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-8p Integrated Services Router » Version: N/A
When used together with: Cisco » 1101-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1109-2p Integrated Services Router » Version: N/A
When used together with: Cisco » 1109-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1111x-8p Integrated Services Router » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4321 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » 4351 Integrated Services Router » Version: N/A
When used together with: Cisco » 4431 Integrated Services Router » Version: N/A
When used together with: Cisco » 4451-x Integrated Services Router » Version: N/A
When used together with: Cisco » 4461 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Isa 3000 » Version: N/A
Cisco » Firepower Threat Defense
Versions before (<) 6.7.0
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
Matching versions
Cisco » Secure Firewall Management Center » Version: 2.9.14.0
cpe:2.3:a:cisco:secure_firewall_management_center:2.9.14.0:*:*:*:*:*:*:*
Matching versions
Cisco » Secure Firewall Management Center » Version: 2.9.15
cpe:2.3:a:cisco:secure_firewall_management_center:2.9.15:*:*:*:*:*:*:*
Matching versions
Cisco » Secure Firewall Management Center » Version: 2.9.16
cpe:2.3:a:cisco:secure_firewall_management_center:2.9.16:*:*:*:*:*:*:*
Matching versions
Snort » Snort
Versions before (<) 2.9.17
cpe:2.3:a:snort:snort:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-1223

EPSS FAQ

0.17%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 54 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-1223

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.8	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N	3.9	1.4	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: Low Availability: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE ids for CVE-2021-1223

CWE-693 Protection Mechanism Failure

The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2021-1223

https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html

[SECURITY] [DLA 3317-1] snort security update

CVEs referencing this url
https://www.debian.org/security/2023/dsa-5354

Debian -- Security Information -- DSA-5354-1 snort

CVEs referencing this url
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-filepolbypass-67DEwMe2

Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2021-1223

Products affected by CVE-2021-1223

Exploit prediction scoring system (EPSS) score for CVE-2021-1223

CVSS scores for CVE-2021-1223

CWE ids for CVE-2021-1223

References for CVE-2021-1223