6.5

CVE-2018-20481: canonical ubuntu_linux NULL Pointer Dereference

CVSS: 6.5v3.0MediumModified
AliasesUBUNTU-CVE-2018-20481DEBIAN-CVE-2018-20481
Published 26-12-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-20481 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 3.42% chance of exploitation in the next 30 days, higher than 88.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
37/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.0 (NVD)
EPSS score
3.42%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 10 · Related 5
DLA-1706-1DLA-2287-1MGASA-2019-0092OPENSUSE-SU-2021:3854-1RHSA-2019:2022RHSA-2019:2713

Timeline

  1. 26-12-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

XRef::getEntry in XRef.cc in Poppler 0.72.0 mishandles unallocated XRef entries, which allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted PDF document, when XRefEntry::setFlag in XRef.h is called from Parser::makeStream in Parser.cc.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

3.42%

Chance of exploitation in the next 30 days

Percentile

89%

Versus all other CVEs

30-day change

0.00 pp

From 3.42% on 18-09-2026

18-09-202618-10-2026
EPSS score
3.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (gitlab.freedesktop.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Canonical1 product
Freedesktop1 product
Ubuntu1 product
  • poppler< 0.24.5-2ubuntu4.15 | < 0.41.0-0ubuntu1.11 | < 0.62.0-2ubuntu2.6

4 vendors · 5 products

References

12 links
Show all 12 references