Vulnerability Details : CVE-2018-18020
Potential exploit
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.
Vulnerability category: Denial of service
Products affected by CVE-2018-18020
- cpe:2.3:a:qpdf_project:qpdf:8.2.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-18020
0.11%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 26 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-18020
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
3.3
|
LOW | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
1.8
|
1.4
|
NIST |
CWE ids for CVE-2018-18020
-
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-18020
-
https://github.com/qpdf/qpdf/issues/243
A hangs close to ten minutes in qpdf · Issue #243 · qpdf/qpdf · GitHubExploit;Issue Tracking;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2023/08/msg00037.html
[SECURITY] [DLA 3548-1] qpdf security update
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