CVE catalog
CVE-2018-20721
uriparser: CVE-2018-20721
- Severity
- Critical · CVSS 9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.05% · Oct 27, 2026
URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a "//[::44.1" address.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | uriparser | sid | 1.0.1+dfsg-1 | fixed |
| Debian | uriparser | forky | 1.0.1+dfsg-1 | fixed |
| Debian | uriparser | trixie | 0.9.8+dfsg-2 | fixed |
| Debian | uriparser | bookworm | 0.9.7+dfsg-2 | fixed |
| Ubuntu | uriparser | pro | 0.8.2-1 | vulnerable |
| Ubuntu | uriparser | pro | 0.8.3-1 | vulnerable |
| Ubuntu | uriparser | pro | 0.8.4-1 | vulnerable |
| Ubuntu | uriparser | pro | 0.8.4-1ubuntu0.16.04.1~esm2 | fixed |
| Ubuntu | uriparser | 18.04 | 0.8.4-1 | vulnerable |
| Ubuntu | uriparser | 18.04 | 0.8.4-1+deb9u2build0.18.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | uriparser | source | sid | 0.9.1-1 | low | Not reported | Not reported |
| Debian | uriparser | source | forky | 0.9.1-1 | low | Not reported | Not reported |
| Debian | uriparser | source | trixie | 0.9.1-1 | low | Not reported | Not reported |
| Debian | uriparser | source | bookworm | 0.9.1-1 | low | Not reported | Not reported |
| Ubuntu | uriparser | deb | pro | 0.8.4-1ubuntu0.16.04.1~esm2 | Not reported | UBUNTU-CVE-2018-20721 | Not reported |
| Ubuntu | uriparser | deb | 18.04 | 0.8.4-1+deb9u2build0.18.04.1 | Not reported | UBUNTU-CVE-2018-20721 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [liburiparser1]Fixed
Source package: [uriparser]
Details (2)
0.9.7+dfsg-2· amd64 · bookwormFixed · Fixed:
0.9.1-1dsa · uriparser · debian · bookworm; dsa · uriparser · debian · 12
0.9.7+dfsg-2· arm64 · bookwormFixed · Fixed:
0.9.1-1dsa · uriparser · debian · bookworm; dsa · uriparser · debian · 12
- [liburiparser-dev]Fixed
Source package: [uriparser]
Details (2)
0.9.7+dfsg-2· amd64 · bookwormFixed · Fixed:
0.9.1-1dsa · uriparser · debian · bookworm; dsa · uriparser · debian · 12
0.9.7+dfsg-2· arm64 · bookwormFixed · Fixed:
0.9.1-1dsa · uriparser · debian · bookworm; dsa · uriparser · debian · 12
- [liburiparser-doc]Fixed
Source package: [uriparser]
Details (2)
0.9.7+dfsg-2· all · bookwormFixed · Fixed:
0.9.1-1dsa · uriparser · debian · bookworm; dsa · uriparser · debian · 12
0.9.7+dfsg-2· all · bookwormFixed · Fixed:
0.9.1-1dsa · uriparser · debian · bookworm; dsa · uriparser · debian · 12
[Debian 13 (Trixie)]
- [liburiparser1]Fixed
Source package: [uriparser]
Details (2)
0.9.8+dfsg-2· amd64 · trixieFixed · Fixed:
0.9.1-1dsa · uriparser · debian · 13
0.9.8+dfsg-2· arm64 · trixieFixed · Fixed:
0.9.1-1dsa · uriparser · debian · 13
- [liburiparser-dev]Fixed
Source package: [uriparser]
Details (2)
0.9.8+dfsg-2· amd64 · trixieFixed · Fixed:
0.9.1-1dsa · uriparser · debian · 13
0.9.8+dfsg-2· arm64 · trixieFixed · Fixed:
0.9.1-1dsa · uriparser · debian · 13
- [liburiparser-doc]Fixed
Source package: [uriparser]
Details (2)
0.9.8+dfsg-2· all · trixieFixed · Fixed:
0.9.1-1dsa · uriparser · debian · 13
0.9.8+dfsg-2· all · trixieFixed · Fixed:
0.9.1-1dsa · uriparser · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2019_0165-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2018-20721]
- [https://osv.dev/vulnerability/DLA-1682-1]
- [https://osv.dev/vulnerability/DLA-2834-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2018-20721]
- [https://security-tracker.debian.org/tracker/CVE-2018-20721]
- [https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-20721.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]