Vulnerability · Published Apr 8, 2021 · Assigned by cisco
CVE-2021-1252Clam AntiVirus (ClamAV) Excel XLM Parser Denial of Service Vulnerability
High 7.5
In plain English
A high-severity improper input validation in ClamAV from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | clamav | 0.103.2-r0 | ALPINE-CVE-2021-1252 |
| Alpine:v3.21 | clamav | 0.103.2-r0 | ALPINE-CVE-2021-1252 |
| Alpine:v3.22 | clamav | 0.103.2-r0 | ALPINE-CVE-2021-1252 |
| Alpine:v3.23 | clamav | 0.103.2-r0 | ALPINE-CVE-2021-1252 |
| Alpine:v3.24 | clamav | 0.103.2-r0 | ALPINE-CVE-2021-1252 |
| Debian:12 | clamav | 0.103.2+dfsg-1 | DEBIAN-CVE-2021-1252 |
| Debian:13 | clamav | 0.103.2+dfsg-1 | DEBIAN-CVE-2021-1252 |
| Debian:14 | clamav | 0.103.2+dfsg-1 | DEBIAN-CVE-2021-1252 |
Affected products (as reported)
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html vendor-advisory, x_refsource_CISCO