CVE-2021-1494

NameCVE-2021-1494
DescriptionMultiple 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 specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3317-1, DSA-5354-1
Debian Bugs1021276

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
snort (PTS)stretch2.9.7.0-5vulnerable
buster (security), buster, buster (lts)2.9.20-0+deb10u1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
snortsourcestretch(unfixed)end-of-life
snortsourcebuster2.9.20-0+deb10u1DLA-3317-1
snortsourcebullseye2.9.20-0+deb11u1DSA-5354-1
snortsource(unstable)(unfixed)1021276

Notes

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc

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