CVE-2018-20721

Ubuntu Security Notice USN-5172-1

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

URI_FUNC() en UriParse.c en uriparser en versiones anteriores a la 0.9.1 tiene una lectura fuera de límites (en las funciones uriParse*Ex*) para un URI incompleto con una dirección IPv6 que contiene una dirección IPv4 embebida, como "//[::44.1".

It was discovered that uriparser mishandled certain input. An attacker could use this vulnerability to cause uriparser to crash or possibly execute arbitrary code. It was discovered that uriparser incorrectly handled certain URIs. An attacker could use this vulnerability to cause a crash or possibly leak sensitive information.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-01-16 CVE Reserved
2019-01-16 CVE Published
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (4)

URL	Tag	Source
https://github.com/uriparser/uriparser/blob/master/ChangeLog	Release Notes
https://lists.debian.org/debian-lts-announce/2019/02/msg00028.html	Mailing List
https://lists.debian.org/debian-lts-announce/2021/11/msg00029.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://github.com/uriparser/uriparser/commit/cef25028de5ff872c2e1f0a6c562eb3ea9ecbce4	2021-12-16

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Uriparser Project Search vendor "Uriparser Project"		Uriparser Search vendor "Uriparser Project" for product "Uriparser"				< 0.9.1 Search vendor "Uriparser Project" for product "Uriparser" and version " < 0.9.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected