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, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2456-1, DLA-3432-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pypy3 (PTS)bullseye (security), bullseye7.3.5+dfsg-2+deb11u2fixed
bookworm7.3.11+dfsg-2+deb12u2fixed
sid, trixie7.3.17+dfsg-2fixed
python2.7 (PTS)bullseye2.7.18-8+deb11u1vulnerable
python3.9 (PTS)bullseye3.9.2-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pypy3source(unstable)7.3.3+dfsg-1
python2.7sourcebuster2.7.16-2+deb10u2DLA-3432-1
python2.7source(unstable)(unfixed)
python3.5sourcestretch3.5.3-1+deb9u3DLA-2456-1
python3.5source(unstable)(unfixed)
python3.7sourcebuster3.7.3-2+deb10u3
python3.7source(unstable)(unfixed)
python3.8source(unstable)3.8.5-1
python3.9source(unstable)3.9.0~b5-1

Notes

[bullseye] - python2.7 <ignored> (Unsupported in Bullseye, only included to build a few applications)
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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