CVE-2017-9107

NameCVE-2017-9107
DescriptionAn issue was discovered in adns before 1.5.2. It overruns reading a buffer if a domain ends with backslash. If the query domain ended with \, and adns_qf_quoteok_query was specified, qdparselabel would read additional bytes from the buffer and try to treat them as the escape sequence. It would depart the input buffer and start processing many bytes of arbitrary heap data as if it were the query domain. Eventually it would run out of input or find some other kind of error, and declare the query domain invalid. But before then it might outrun available memory and crash. In principle this could be a denial of service attack.
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
adns (PTS)stretch1.5.0~rc1-1vulnerable
buster1.5.0~rc1-1.1vulnerable
bullseye, sid1.5.1-0.1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
adnssource(unstable)(unfixed)unimportant

Notes

http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git;a=commit;h=278f8eee581c4c4a0ddd0f98c4dc8c2974cf6b90
Stub resolver that should only be used with trusted recursors

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