CVE-2018-11503

NameCVE-2018-11503
DescriptionThe isfootnote function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.
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-1499-1, DSA-4293-1
NVD severitymedium
Debian Bugs901912

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
discount (PTS)stretch (security), stretch2.2.2-1+deb9u1fixed
buster2.2.4-1fixed
bullseye, sid2.2.6-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
discountsourcejessie2.1.7-1+deb8u1DLA-1499-1
discountsourcestretch2.2.2-1+deb9u1DSA-4293-1
discountsource(unstable)2.2.4-1901912

Notes

https://github.com/Orc/discount/issues/189#issuecomment-392247798
POC: https://github.com/fCorleone/fuzz_programs/blob/master/discount/issue2_testcase
Fixed by https://github.com/Orc/discount/commit/b002a5a4db31e42dfb45451c059bc56941c17974

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