CVE-2020-26116

NameCVE-2020-26116
Descriptionhttp.client in Python 3.x before 3.5.10, 3.6.x before 3.6.12, 3.7.x before 3.7.9, and 3.8.x before 3.8.5 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.request.
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
python3.5 (PTS)stretch3.5.3-1+deb9u1vulnerable
stretch (security)3.5.3-1+deb9u2vulnerable
python3.7 (PTS)buster3.7.3-2+deb10u2vulnerable
python3.8 (PTS)bullseye, sid3.8.6-1fixed
python3.9 (PTS)bullseye, sid3.9.0-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python3.5source(unstable)(unfixed)
python3.7source(unstable)(unfixed)
python3.8source(unstable)3.8.5-1
python3.9source(unstable)3.9.0~b5-1

Notes

[buster] - python3.7 <no-dsa> (Minor issue)
https://bugs.python.org/issue39603
https://python-security.readthedocs.io/vuln/http-header-injection-method.html
https://github.com/python/cpython/commit/8ca8a2e8fb068863c1138f07e3098478ef8be12e (master)
https://github.com/python/cpython/commit/27b811057ff5e93b68798e278c88358123efdc71 (v3.9.0b5)
https://github.com/python/cpython/commit/668d321476d974c4f51476b33aaca870272523bf (v3.8.5)
https://github.com/python/cpython/commit/ca75fec1ed358f7324272608ca952b2d8226d11a (v3.7.9)
https://github.com/python/cpython/commit/f02de961b9f19a5db0ead56305fe0057a78787ae (v3.6.12)
https://github.com/python/cpython/commit/524b8de630036a29ca340bc2ae6fd6dc7dda8f40 (v3.5.10)

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