CVE-2019-9740

NameCVE-2019-9740
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 query string after a ? character) followed by an HTTP header or a Redis command. 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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1834-1, DLA-1835-1, DLA-2280-1, DLA-2337-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python2.7 (PTS)stretch2.7.13-2+deb9u3vulnerable
stretch (security)2.7.13-2+deb9u5fixed
buster2.7.16-2+deb10u1fixed
bookworm, sid, bullseye2.7.18-8fixed
python3.5 (PTS)stretch3.5.3-1+deb9u1vulnerable
stretch (security)3.5.3-1+deb9u4fixed
python3.7 (PTS)buster3.7.3-2+deb10u3fixed

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/issue30458
https://bugs.python.org/issue36276 (duplicate)
https://bugs.python.org/issue36274 (common regression fix)
https://bugs.python.org/issue38216 (common regression fix)
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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