9.8

CVE-2018-20721: debian debian_linux Out-of-bounds Read

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2018-20721DEBIAN-CVE-2018-20721DLA-1682-1
Published 16-01-2019Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-20721 is a critical (CVSS 9.8) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 2.05% chance of exploitation in the next 30 days, higher than 80.9% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
2.05%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 5
OPENSUSE-SU-2019:0165-1OPENSUSE-SU-2019:0171-1OPENSUSE-SU-2024:11488-1USN-5172-1USN-5172-2

Timeline

  1. 16-01-2019
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 3 sources · 3 versions

EPSS trend

Probability

2.05%

Chance of exploitation in the next 30 days

Percentile

81%

Versus all other CVEs

30-day change

0.00 pp

From 2.05% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.05%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • uriparser< 0.9.1-1 | < 0.8.4-1+deb9u2 | < 0.8.0.1-2+deb8u2
  • debian_linuxEOL8.0 | 9.0
Ubuntu1 product
  • uriparser< 0.7.5-1ubuntu2+esm2 | < 0.8.4-1ubuntu0.16.04.1~esm2 | < 0.8.4-1+deb9u2build0.18.04.1
Uriparser_project1 product

3 vendors · 4 products

References

9 links