CVE-2019-9947

NameCVE-2019-9947
DescriptionAn issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the path component of a URL that lacks a ? character) followed by an HTTP header or a Redis command. This is similar to the CVE-2019-9740 query string issue. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-1834-1, DLA-1835-1, DLA-2280-1, DLA-2337-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python2.7 (PTS)buster2.7.16-2+deb10u1fixed
buster (security)2.7.16-2+deb10u4fixed
bullseye2.7.18-8+deb11u1fixed
python3.7 (PTS)buster3.7.3-2+deb10u3fixed
buster (security)3.7.3-2+deb10u7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python2.7sourcejessie2.7.9-2+deb8u3DLA-1834-1
python2.7sourcestretch2.7.13-2+deb9u4DLA-2337-1
python2.7sourcebuster2.7.16-2+deb10u1
python2.7source(unstable)2.7.16-3
python3.4sourcejessie3.4.2-1+deb8u3DLA-1835-1
python3.4source(unstable)(unfixed)
python3.5sourcestretch3.5.3-1+deb9u2DLA-2280-1
python3.5source(unstable)(unfixed)
python3.6source(unstable)(unfixed)
python3.7sourcebuster3.7.3-2+deb10u1
python3.7source(unstable)3.7.4~rc2-2

Notes

https://bugs.python.org/issue35906
Introduced by: https://github.com/python/cpython/commit/cc54c1c0d2d05fe7404ba64c53df4b1352ed2262 (v3.4.7rc1)
Introduced by: https://github.com/python/cpython/commit/d4324baca4c03eb8d55446cd1b74b32ec5633af5 (v2.7.14rc1)
CVE-2019-9947 issue fixed with same fix as for CVE-2019-9740
Patch 2.7: https://github.com/python/cpython/commit/bb8071a4cae5ab3fe321481dd3d73662ffb26052

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