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, ELA-289-1, ELA-853-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python2.7 (PTS)jessie, jessie (lts)2.7.9-2-ds1-1+deb8u11fixed
stretch (security)2.7.13-2+deb9u6vulnerable
stretch (lts), stretch2.7.13-2+deb9u8fixed
buster2.7.16-2+deb10u1vulnerable
buster (security)2.7.16-2+deb10u3fixed
bullseye2.7.18-8+deb11u1vulnerable
python3.4 (PTS)jessie, jessie (lts)3.4.2-1+deb8u15fixed
python3.5 (PTS)stretch (security)3.5.3-1+deb9u5fixed
stretch (lts), stretch3.5.3-1+deb9u8fixed
python3.7 (PTS)buster3.7.3-2+deb10u3fixed
buster (security)3.7.3-2+deb10u6fixed
python3.9 (PTS)bullseye3.9.2-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python2.7sourcejessie2.7.9-2-ds1-1+deb8u10ELA-853-1
python2.7sourcestretch2.7.13-2+deb9u7ELA-853-1
python2.7sourcebuster2.7.16-2+deb10u2DLA-3432-1
python2.7source(unstable)(unfixed)
python3.4sourcejessie3.4.2-1+deb8u9ELA-289-1
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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