| Name | CVE-2022-45061 |
| Description | An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname. For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16. |
| 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-3432-1, DLA-3477-1, DLA-3966-1, DLA-3980-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| pypy3 (PTS) | 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-2 | fixed | |
| python2.7 (PTS) | 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 | |
| python3.9 (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 |
|---|---|---|---|---|---|---|
| pypy3 | source | bullseye | 7.3.5+dfsg-2+deb11u4 | DLA-3966-1 | ||
| pypy3 | source | (unstable) | 7.3.11+dfsg-1 | |||
| python2.7 | source | buster | 2.7.16-2+deb10u2 | DLA-3432-1 | ||
| python2.7 | source | (unstable) | (unfixed) | |||
| python3.10 | source | (unstable) | 3.10.9-1 | |||
| python3.11 | source | (unstable) | 3.11.1-1 | |||
| python3.7 | source | buster | 3.7.3-2+deb10u5 | DLA-3477-1 | ||
| python3.7 | source | (unstable) | (unfixed) | |||
| python3.9 | source | bullseye | 3.9.2-1+deb11u2 | DLA-3980-1 | ||
| python3.9 | source | (unstable) | (unfixed) |
[bullseye] - python2.7 <ignored> (Unsupported in Bullseye, only included to build a few applications)
[buster] - pypy3 <no-dsa> (Minor issue)
https://github.com/python/cpython/issues/98433
https://github.com/python/cpython/pull/99092
https://github.com/python/cpython/commit/a6f6c3a3d6f2b580f2d87885c9b8a9350ad7bf15 (v3.11.1)
https://github.com/python/cpython/commit/9bb8e18ca46fe66fa6802602f8a7228a24dd785f (v3.10.9)
https://github.com/python/cpython/commit/c09dba57cfbbf74273ce44b1f48f71b46806605c (v3.9.16)
https://github.com/python/cpython/commit/82ca2839c9ec6bf9a9400e791a52411824df67f3 (v3.8.16)
https://github.com/python/cpython/commit/b0b590be9597fd5919228d251812dd54145f70a7 (v3.7.16)