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CVE-2018-20030

25
FAUCET Score

CVE-2018-20030 describes a denial-of-service vulnerability in libexif version 0.6.21, specifically affecting the processing of EXIF_IFD_INTEROPERABILITY and EXIF_IFD_EXIF tags. This flaw allows an unauthenticated attacker to exhaust CPU resources, leading to a high-severity impact (CVSS 7.5). While the vulnerability is easily exploitable over a network, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
0.6.21CPE matchmatch criteria
cpe:2.3:a:libexif_project:libexif:0.6.21:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.80%
Probability of exploitation in next 30 days
EPSS Percentile
88.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0380 is in the 80th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libexif
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libexif
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libexif
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libexif

Vendor Advisories (1)

redhatCVE-2018-20030Low

libexif: Input validation issue resulting in a denial of service

Dec 20, 2018

References

lists.opensuse.org / opensuse-security-announce/2020-03/msg00000.html
lists.opensuse.org / opensuse-security-announce/2020-06/msg00017.html
github.com / libexif/libexif/commit/6aa11df549114ebda520dde4cdaea2f9357b2c89
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2020/05/msg00016.html
lists.debian.org / debian-lts-announce/2020/05/msg00025.html
secuniaresearch.flexerasoftware.com / secunia_research/2018-28
Third Party Advisory
usn.ubuntu.com / 4358-1