discount: Heap-based buffer-overflow in markdown.c:islist() allows for denial of service
Published May 26, 2018
5.5
MEDIUMCVSS 3.0
EPSS 1.49%
Description
The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.
Affected products
No data.
Configuration 1
- 2.2.3
Configuration 2
- 8.0
- 9.0
No data.
Red Hat Enterprise Linux 8
discount
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | discount | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.49% (0.01487) | 73.13th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.51% (0.01510) | 71.03th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.25% (0.00251) | 46.47th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.42% (0.00421) | 74.43th | v3 (v2023.03.01) |
| May 5, 2024 | 0.42% (0.00421) | 74.08th | v3 (v2023.03.01) |
| Apr 4, 2024 | 0.36% (0.00356) | 71.65th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.30% (0.00296) | 68.49th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.30% (0.00296) | 65.45th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.25% (0.00249) | 60.91th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.30% (0.01300) | 31.12th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.30% (0.01300) | 0.00th | v1 |
References (7)
- https://access.redhat.com/security/cve/CVE-2018-11504 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1583005 Issue Tracking
- https://github.com/Orc/discount/issues/189#issuecomment-392247798 x_refsource_MISCIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00009.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-11504
- https://www.cve.org/CVERecord?id=CVE-2018-11504
- https://www.debian.org/security/2018/dsa-4293 vendor-advisoryx_refsource_DEBIANThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2018-11504 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1583005 | Issue Tracking | |
| https://github.com/Orc/discount/issues/189#issuecomment-392247798 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2018/09/msg00009.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-11504 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-11504 | ||
| https://www.debian.org/security/2018/dsa-4293 | vendor-advisoryx_refsource_DEBIANThird Party Advisory |
Change history (0)
No recorded changes yet.