CVE-2018-1000027

NameCVE-2018-1000027
DescriptionThe Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later.
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)
ReferencesDLA-1266-1, DLA-1267-1, DSA-4122-1
NVD severitymedium (attack range: remote)
Debian Bugs888720

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
squid (PTS)buster, sid4.3-1fixed
squid3 (PTS)jessie (security), jessie3.4.8-6+deb8u5fixed
stretch (security), stretch3.5.23-5+deb9u1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
squidsource(unstable)4.1-1medium
squidsourceexperimental4.0.23-1~exp8medium
squidsourcewheezy2.7.STABLE9-4.1+deb7u3mediumDLA-1267-1
squid3source(unstable)3.5.27-1medium888720
squid3sourcejessie3.4.8-6+deb8u5mediumDSA-4122-1
squid3sourcestretch3.5.23-5+deb9u1mediumDSA-4122-1
squid3sourcewheezy3.1.20-2.2+deb7u8mediumDLA-1266-1

Notes

src:squid as source package reintroduced for 4.x in experimental
Squid 3.5: http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch
Squid 4: http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch
http://www.squid-cache.org/Advisories/SQUID-2018_2.txt

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