DescriptionYaws 1.91 allows Unauthenticated Remote File Disclosure via HTTP Directory Traversal with /%5C../ to port 8080. NOTE: this CVE is only about use of an initial /%5C sequence to defeat traversal protection mechanisms; the initial /%5C sequence was apparently not discussed in earlier research on this product.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
yaws (PTS)stretch2.0.4+dfsg-1fixed
stretch (security)2.0.4+dfsg-1+deb9u1fixed
buster (security)2.0.6+dfsg-1+deb10u1fixed
bullseye, sid2.0.8+dfsg-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


Slightly different, additional CVE assignment which MITRE insists on, but fixed by the
original patch for CVE-2011-4350

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