CVE-2016-4300

NameCVE-2016-4300
DescriptionInteger overflow in the read_SubStreamsInfo function in archive_read_support_format_7zip.c in libarchive before 3.2.1 allows remote attackers to execute arbitrary code via a 7zip file with a large number of substreams, which triggers a heap-based buffer overflow.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-554-1, DSA-3657-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libarchive (PTS)wheezy3.0.4-3+wheezy1vulnerable
wheezy (security)3.0.4-3+wheezy6+deb7u1fixed
jessie (security), jessie3.1.2-11+deb8u3fixed
stretch3.2.2-2fixed
buster, sid3.2.2-3.1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libarchivesource(unstable)3.2.1-1medium
libarchivesourcejessie3.1.2-11+deb8u2mediumDSA-3657-1
libarchivesourcewheezy3.0.4-3+wheezy2mediumDLA-554-1

Notes

http://blog.talosintel.com/2016/06/the-poisoned-archives.html
http://www.talosintel.com/reports/TALOS-2016-0152/
https://github.com/libarchive/libarchive/issues/718
Requirement: https://github.com/libarchive/libarchive/commit/3d469df8eaace8297a27ce62befa295c0fdc5a3a
Fixed by: https://github.com/libarchive/libarchive/commit/e79ef306afe332faf22e9b442a2c6b59cb175573 (v3.2.1)
Notice introduction of UMAX_ENTRY with 3d469df8eaace8297a27ce62befa295c0fdc5a3a
Libarchive 3.1.2 and lower has a much smaller "UMAX_ENTRY", which is hardcoded
in various places before 3d469df8eaace8297a27ce62befa295c0fdc5a3a and has value
1000000, making exploitation more difficult but not impossible.

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