CVE-2019-5010

NameCVE-2019-5010
DescriptionAn exploitable denial-of-service vulnerability exists in the X509 certificate parser of Python.org Python 2.7.11 / 3.6.6. A specially crafted X509 certificate can cause a NULL pointer dereference, resulting in a denial of service. An attacker can initiate or accept TLS connections using crafted certificates to trigger this vulnerability.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-1663-1, DLA-1834-1, DLA-2280-1, DLA-2337-1
Debian Bugs921040, 921063, 921064

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+deb9u6fixed
stretch (lts), stretch2.7.13-2+deb9u8fixed
buster2.7.16-2+deb10u1fixed
buster (security)2.7.16-2+deb10u3fixed
bullseye2.7.18-8+deb11u1fixed
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

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python2.7sourcewheezy(not affected)
python2.7sourcejessie2.7.9-2+deb8u3DLA-1834-1
python2.7sourcestretch2.7.13-2+deb9u4DLA-2337-1
python2.7source(unstable)2.7.15-6921040
python3.4sourcejessie3.4.2-1+deb8u2DLA-1663-1
python3.4source(unstable)(unfixed)
python3.5sourcestretch3.5.3-1+deb9u2DLA-2280-1
python3.5source(unstable)(unfixed)
python3.6source(unstable)(unfixed)921063
python3.7source(unstable)3.7.2-2921064

Notes

https://bugs.python.org/issue35746
https://github.com/python/cpython/pull/11569
https://github.com/python/cpython/commit/be5de958e9052e322b0087c6dba81cdad0c3e031 (3.7.x)
https://github.com/python/cpython/commit/216a4d83c3b72f4fdcd81b588dc3f42cc461739a (3.6.x)
https://github.com/python/cpython/commit/06b15424b0dcacb1c551b2a36e739fffa8d0c595 (2.7.x)
[wheezy] - python2.7 <not-affected> (Vulnerable CRL parsing code not present)

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