| Name | CVE-2020-8492 |
| Description | Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7 through 3.7.6, and 3.8 through 3.8.1 allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking. |
| 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-2280-1, DLA-3432-1, ELA-239-1, ELA-853-1 |
| Debian Bugs | 970099 |
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 | vulnerable | |
| stretch (lts), stretch | 2.7.13-2+deb9u9 | fixed | |
| buster | 2.7.16-2+deb10u1 | vulnerable | |
| 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 |
|---|---|---|---|---|---|---|
| python2.7 | source | jessie | 2.7.9-2-ds1-1+deb8u10 | ELA-853-1 | ||
| python2.7 | source | stretch | 2.7.13-2+deb9u7 | ELA-853-1 | ||
| python2.7 | source | buster | 2.7.16-2+deb10u2 | DLA-3432-1 | ||
| python2.7 | source | (unstable) | 2.7.18-2 | low | 970099 | |
| python3.4 | source | wheezy | (unfixed) | end-of-life | ||
| python3.4 | source | jessie | 3.4.2-1+deb8u8 | ELA-239-1 | ||
| python3.4 | source | (unstable) | (unfixed) | |||
| python3.5 | source | stretch | 3.5.3-1+deb9u2 | DLA-2280-1 | ||
| python3.5 | source | (unstable) | (unfixed) | |||
| python3.7 | source | buster | 3.7.3-2+deb10u2 | |||
| python3.7 | source | (unstable) | (unfixed) | |||
| python3.8 | source | (unstable) | 3.8.3~rc1-1 |
[jessie] - python3.4 <postponed> (Minor issue)
[jessie] - python2.7 <no-dsa> (Minor issue)
https://bugs.python.org/issue39503
https://github.com/python/cpython/pull/18284
https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html
https://github.com/python/cpython/commit/0b297d4ff1c0e4480ad33acae793fbaf4bf015b4 (master)
https://github.com/python/cpython/commit/ea9e240aa02372440be8024acb110371f69c9d41 (3.8-branch)
https://github.com/python/cpython/commit/b57a73694e26e8b2391731b5ee0b1be59437388e (3.7-branch)
https://github.com/python/cpython/commit/69cdeeb93e0830004a495ed854022425b93b3f3e (3.6-branch)
[wheezy] - python2.7 <no-dsa> (Minor issue)