CVE-2021-42911

published 2022-03-29

CVE-2021-42911: A Format String vulnerability exists in DrayTek Vigor 2960 <= 1.5.1.3, DrayTek Vigor 3900 <= 1.5.1.3, and DrayTek Vigor 300B <= 1.5.1.3 in the mainfunction.cgi…

Priority P3 59 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

A Format String vulnerability exists in DrayTek Vigor 2960 <= 1.5.1.3, DrayTek Vigor 3900 <= 1.5.1.3, and DrayTek Vigor 300B <= 1.5.1.3 in the mainfunction.cgi file via a crafted HTTP message containing malformed QUERY STRING, which could let a remote malicious user execute arbitrary code.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
draytek	vigor2960_firmware	<= 1.5.1.3	—
draytek	vigor300b_firmware	<= 1.5.1.3	—
draytek	vigor3900_firmware	<= 1.5.1.3	—

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 7.5 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P

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CWE-134