| Name | CVE-2018-18020 |
| Description | In QPDF 8.2.1, in libqpdf/QPDFWriter.cc, QPDFWriter::unparseObject and QPDFWriter::unparseChild have recursive calls for a long time, which allows remote attackers to cause a denial of service via a crafted PDF file. |
| 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-3548-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| qpdf (PTS) | jessie | 5.1.2-2 | vulnerable |
| stretch (lts), stretch | 6.0.0-2+deb9u2 | vulnerable |
| buster (security), buster, buster (lts) | 8.4.0-2+deb10u1 | fixed |
| bullseye | 10.1.0-1 | fixed |
| bookworm | 11.3.0-1+deb12u1 | fixed |
| sid, trixie | 11.9.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| qpdf | source | wheezy | (unfixed) | end-of-life | | |
| qpdf | source | buster | 8.4.0-2+deb10u1 | | DLA-3548-1 | |
| qpdf | source | (unstable) | 9.0.0-1 | | | |
Notes
[stretch] - qpdf <no-dsa> (Minor issue)
[jessie] - qpdf <no-dsa> (Minor issue)
https://github.com/qpdf/qpdf/issues/243
https://github.com/qpdf/qpdf/commit/cf469d789024cdda41684f1ea48b41829b98c242