Vulnerability in Cisco 1100-4p Integrated Services Router
CVE-2021-1223
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 · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.020 (81.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: +0.000
Affected products
- Cisco 1100-4p Integrated Services Router
- Cisco 1100-8p Integrated Services Router
- Cisco 1101-4p Integrated Services Router
- Cisco 1109-2p Integrated Services Router
- Cisco 1109-4p Integrated Services Router
- Cisco 1111x-8p Integrated Services Router
- Cisco 4221 Integrated Services Router
- Cisco 4321 Integrated Services Router
- Cisco 4331 Integrated Services Router
- Cisco 4351 Integrated Services Router
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-fi… (vendor-advisory, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2023/02/msg00011.html (mailing-list)
- www.debian.org/security/2023/dsa-5354 (vendor-advisory)
Frequently asked questions
- What is CVE-2021-1223?
- CVE-2021-1223 is a high-severity vulnerability in Cisco 1100-4p Integrated Services Router, classified under Protection Mechanism Failure. CVSS score: 7.5/10. Published 2021-01-13.
- How severe is CVE-2021-1223?
- High severity. CVSS v3 base score is 7.5 out of 10.