| Name | CVE-2021-28861 |
| Description | Python 3.x through 3.10 has an open redirection vulnerability in lib/http/server.py due to no protection against multiple (/) at the beginning of URI path which may leads to information disclosure. NOTE: this is disputed by a third party because the http.server.html documentation page states "Warning: http.server is not recommended for production. It only implements basic security checks." |
| 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-3966-1, DLA-3980-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pypy (PTS) | jessie | 2.4.0+dfsg-3 | vulnerable |
| stretch | 5.6.0+dfsg-4 | vulnerable |
| buster | 7.0.0+dfsg-3 | vulnerable |
| bullseye | 7.3.3+dfsg-2 | vulnerable |
| pypy3 (PTS) | buster | 7.0.0+dfsg-3 | vulnerable |
| bullseye | 7.3.5+dfsg-2+deb11u2 | vulnerable |
| bullseye (security) | 7.3.5+dfsg-2+deb11u4 | fixed |
| bookworm | 7.3.11+dfsg-2+deb12u2 | fixed |
| sid, trixie | 7.3.17+dfsg-3 | fixed |
| python2.7 (PTS) | jessie, jessie (lts) | 2.7.9-2-ds1-1+deb8u12 | vulnerable |
| stretch (security) | 2.7.13-2+deb9u6 | vulnerable |
| stretch (lts), stretch | 2.7.13-2+deb9u9 | vulnerable |
| buster (security), buster, buster (lts) | 2.7.16-2+deb10u4 | vulnerable |
| bullseye | 2.7.18-8+deb11u1 | vulnerable |
| python3.11 (PTS) | bookworm | 3.11.2-6+deb12u4 | fixed |
| bookworm (security) | 3.11.2-6+deb12u3 | fixed |
| python3.4 (PTS) | jessie, jessie (lts) | 3.4.2-1+deb8u19 | vulnerable |
| python3.5 (PTS) | stretch (security) | 3.5.3-1+deb9u5 | vulnerable |
| stretch (lts), stretch | 3.5.3-1+deb9u11 | vulnerable |
| python3.7 (PTS) | buster, buster (lts) | 3.7.3-2+deb10u9 | vulnerable |
| buster (security) | 3.7.3-2+deb10u7 | vulnerable |
| python3.9 (PTS) | bullseye | 3.9.2-1 | vulnerable |
| bullseye (security) | 3.9.2-1+deb11u2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| pypy | source | (unstable) | (unfixed) | unimportant | | |
| pypy3 | source | bullseye | 7.3.5+dfsg-2+deb11u4 | | DLA-3966-1 | |
| pypy3 | source | (unstable) | 7.3.10+dfsg-1 | unimportant | | |
| python2.7 | source | (unstable) | (unfixed) | unimportant | | |
| python3.10 | source | (unstable) | 3.10.6-1 | unimportant | | |
| python3.11 | source | (unstable) | 3.11.0~b4-1 | unimportant | | |
| python3.4 | source | (unstable) | (unfixed) | unimportant | | |
| python3.5 | source | (unstable) | (unfixed) | unimportant | | |
| python3.7 | source | (unstable) | (unfixed) | unimportant | | |
| python3.9 | source | bullseye | 3.9.2-1+deb11u2 | | DLA-3980-1 | |
| python3.9 | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://bugs.python.org/issue43223
https://github.com/python/cpython/pull/93879
https://github.com/python/cpython/commit/e2e8847bf52f4a81490653c6d13b7e3821b2c2be (v3.11.0b4)
https://github.com/python/cpython/commit/5715382d3a89ca118ce2e224d8c69550d21fe51b (v3.10.6)
https://github.com/python/cpython/commit/defaa2b19a9a01c79c1d5641a8aa179bb10ead3f (v3.9.14)
https://github.com/python/cpython/commit/4dc2cae3abd75f386374d0635d00443b897d0672 (v3.8.14)
https://github.com/python/cpython/commit/8a34afd55258c721e446d6de4a70353c39a24148 (v3.7.14)