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Fencer Vulns
medium 6.5

CVE-2020-18898 json

A stack exhaustion issue in the printIFDStructure function of Exiv2 0.27 allows remote attackers to cause a denial of service (DOS) via a c…

published 2021-08-19 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-0078

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

A stack exhaustion issue in the printIFDStructure function of Exiv2 0.27 allows remote attackers to cause a denial of service (DOS) via a crafted file.

Patch / fix

  • exiv2 RHEL 8 0.27.5-2.el8
  • exiv2-libs RHEL 8 0.27.5-2.el8
  • compat-exiv2-026 RHEL 8 0.26-7.el8

red hat advisories RHSA-2022:1842RHSA-2022:1797

  • exiv2 SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +20 more 0.26-150000.6.16.1

suse advisories SUSE-SU-2022:3598-1

  • compat-exiv2-026 AlmaLinux 8 0.26-7.el8
  • exiv2 AlmaLinux 8 0.27.5-2.el8
  • exiv2-libs AlmaLinux 8 0.27.5-2.el8

almalinux advisories ALSA-2022:1797ALSA-2022:1842

  • compat-exiv2-026 Rocky Linux 8 0.26-7.el8
  • exiv2 Rocky Linux 8 0.27.5-2.el8

rocky linux advisories RLSA-2022:1797RLSA-2022:1842

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-18898 updated cvss 6.5

exiv2: stack exhaustion issue in the printIFDStructure function may lead to DoS

  • Red Hat Enterprise Linux 6 exiv2, exiv2-libs Red Hat Enterprise Linux 7 exiv2, exiv2-libs, compat-exiv2-023, compat-exiv2-026
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) exiv2 0.27.5-2.el8, exiv2-libs 0.27.5-2.el8, compat-exiv2-026 0.26-7.el8
    fixed: vendor fix RHSA-2022:1797
  • Red Hat Enterprise Linux CRB (v. 8) exiv2-doc 0.27.5-2.el8, exiv2-devel 0.27.5-2.el8, exiv2-debuginfo 0.27.5-2.el8, exiv2-debugsource 0.27.5-2.el8, exiv2-libs-debuginfo 0.27.5-2.el8
    fixed: vendor fix RHSA-2022:1842
  • Red Hat Enterprise Linux 9 exiv2, exiv2-libs
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.43% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/Exiv2/exiv2/issues/741 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.