Denial of Service Vulnerability in uriparser Affects Multiple Ubuntu Releases
Severity: Medium (Score: 45.8)
Sources: Ubuntu, Linuxsecurity
Published: · Updated:
Keywords: ubuntu, uriparser, issue, discovered, usn-8409-1, vulnerability, security
Severity indicators: vulnerability, issue
Summary
A vulnerability in uriparser has been discovered, affecting several Ubuntu LTS releases including 24.04, 22.04, 20.04, 18.04, 16.04, and 14.04. The flaw allows an attacker to craft specific URI strings that could cause the uriparser library to crash, leading to a denial of service. This issue has been confirmed and can be mitigated by updating to the latest package versions available through Ubuntu Pro. Users are advised to perform standard system updates to address this vulnerability. The issue does not appear to be actively exploited at this time, but it poses a risk if left unpatched. The vulnerability highlights the importance of maintaining updated software to prevent potential service disruptions. Key Points: • A denial of service vulnerability in uriparser affects multiple Ubuntu LTS versions. • Attackers can exploit the flaw by sending specially crafted URI strings. • Users are advised to update to the latest package versions to mitigate the risk.
Detailed Analysis
**Impact** Multiple Ubuntu Long Term Support (LTS) releases are affected, including versions 14.04 through 24.04 and their derivatives. The vulnerability can cause uriparser to crash, resulting in a denial of service condition. This impacts any business or operational environment relying on these Ubuntu versions, potentially disrupting services that parse URI inputs. No data breach or data integrity risk is indicated in the reports. **Technical Details** The vulnerability arises from uriparser’s incorrect handling of specially crafted URI strings, which can trigger a crash. The attack vector involves sending malformed URI inputs to applications using the uriparser library. No CVE identifier or malware/tool names are provided. The kill chain stage corresponds to the impact phase, specifically service disruption via denial of service. No indicators of compromise (IOCs) are mentioned. **Recommended Response** Apply the updated liburiparser1 package versions provided for each affected Ubuntu release, available through Ubuntu Pro or standard system updates. Prioritize patching systems running any of the listed LTS versions to mitigate the denial of service risk. Monitor for unusual application crashes related to URI processing. No additional detection or blocking indicators are specified.
Source articles (2)
- USN-8409-1: uriparser vulnerability — Ubuntu · 2026-06-09
It was discovered that uriparser incorrectly handled certain URI strings. An attacker could possibly use this issue to cause uriparser to crash, resulting in a denial of service. It was discovered tha… - Ubuntu 24.04 8409 — Linuxsecurity · 2026-06-10
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: uripar…
Timeline
- 2026-06-09 — Vulnerability discovered in uriparser: The flaw was confirmed to allow denial of service attacks via specially crafted URI strings, affecting multiple Ubuntu LTS versions.
- 2026-06-10 — Ubuntu Security Notice USN-8409-1 released: Ubuntu published an advisory detailing the vulnerability and recommended package updates for affected versions.
Related entities
- DDoS (Attack Type)
- Denial of Service (Attack Type)
- Linux (Platform)
- Ubuntu (Company)