| Name | CVE-2018-14647 |
| Description | Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by constructing an XML document that would cause pathological hash collisions in Expat's internal data structures, consuming large amounts CPU and RAM. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-1834-1, DLA-1835-1, DSA-4306-1, DSA-4307-1, ELA-47-1, ELA-48-1 |
| Debian Bugs | 921039 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python2.7 (PTS) | jessie, jessie (lts) | 2.7.9-2-ds1-1+deb8u12 | fixed |
| stretch (security) | 2.7.13-2+deb9u6 | fixed | |
| stretch (lts), stretch | 2.7.13-2+deb9u9 | fixed | |
| buster | 2.7.16-2+deb10u1 | fixed | |
| buster (security) | 2.7.16-2+deb10u4 | fixed | |
| bullseye | 2.7.18-8+deb11u1 | fixed | |
| python3.4 (PTS) | jessie, jessie (lts) | 3.4.2-1+deb8u17 | fixed |
| python3.5 (PTS) | stretch (security) | 3.5.3-1+deb9u5 | fixed |
| stretch (lts), stretch | 3.5.3-1+deb9u9 | fixed | |
| python3.7 (PTS) | buster | 3.7.3-2+deb10u3 | fixed |
| buster (security) | 3.7.3-2+deb10u7 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python2.6 | source | wheezy | 2.6.8-1.1+deb7u2 | ELA-48-1 | ||
| python2.7 | source | wheezy | 2.7.3-6+deb7u5 | ELA-47-1 | ||
| python2.7 | source | jessie | 2.7.9-2+deb8u3 | DLA-1834-1 | ||
| python2.7 | source | stretch | 2.7.13-2+deb9u3 | DSA-4306-1 | ||
| python2.7 | source | (unstable) | 2.7.15-5 | 921039 | ||
| python3.4 | source | jessie | 3.4.2-1+deb8u3 | DLA-1835-1 | ||
| python3.4 | source | (unstable) | (unfixed) | |||
| python3.5 | source | stretch | 3.5.3-1+deb9u1 | DSA-4307-1 | ||
| python3.5 | source | (unstable) | (unfixed) | |||
| python3.6 | source | (unstable) | 3.6.7~rc1-1 | |||
| python3.7 | source | (unstable) | 3.7.0-7 |
[jessie] - python3.4 <postponed> (minor issue)
https://bugs.python.org/issue34623
master: https://github.com/python/cpython/commit/cb5778f00ce48631c7140f33ba242496aaf7102b
3.7: https://github.com/python/cpython/commit/470a435f3b42c9be5fdb7f7b04f3df5663ba7305
3.6: https://github.com/python/cpython/commit/f7666e828cc3d5873136473ea36ba2013d624fa1
2.7: https://github.com/python/cpython/commit/18b20bad75b4ff0486940fba4ec680e96e70f3a2