DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs986622, 986790

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
clamav (PTS)buster0.103.6+dfsg-0+deb10u1fixed
buster (security)0.103.9+dfsg-0+deb10u1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
clamavsourcestretch(not affected)
clamavsourcebuster(not affected)
clamavsource(unstable)0.103.2+dfsg-1986622, 986790


[buster] - clamav <not-affected> (Affects ony 0.103.0 and 0.103.1)
[stretch] - clamav <not-affected> (Affects ony 0.103.0 and 0.103.1)

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