| Name | CVE-2021-40524 |
| Description | In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. (Versions 1.0.23 through 1.0.49 are affected.) |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 993810 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pure-ftpd (PTS) | jessie, jessie (lts) | 1.0.36-3.2+deb8u1 | vulnerable |
| stretch | 1.0.43-3 | vulnerable |
| buster | 1.0.47-3 | vulnerable |
| bullseye | 1.0.49-4.1 | vulnerable |
| bookworm | 1.0.50-2.1 | fixed |
| sid, trixie | 1.0.50-2.2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| pure-ftpd | source | jessie | (unfixed) | end-of-life | | |
| pure-ftpd | source | (unstable) | 1.0.50-1 | | | 993810 |
Notes
[bullseye] - pure-ftpd <no-dsa> (Minor issue)
[buster] - pure-ftpd <no-dsa> (Minor issue)
[stretch] - pure-ftpd <no-dsa> (Minor issue)
https://github.com/jedisct1/pure-ftpd/pull/158