Improper input validation in Cisco Clamav
CVE-2021-1252
A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper error handling that may result in an infinite loop. An attacker could exploit this vulnerability by sending a crafted Excel file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process hang, resulting in a denial of service condition.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.025 (83.7th percentile) — read the EPSS interpretation.
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:N/A:H.
Affected products
- Cisco Clamav — versions 0.103.0, 0.103.1
- Clamav — versions 0.103.0, 0.103.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-1252?
- CVE-2021-1252 is a high-severity vulnerability in Cisco Clamav, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-04-08.
- How severe is CVE-2021-1252?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-1252 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.