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CVE-2020-27770

20
FAUCET Score

CVE-2020-27770 is a medium-severity vulnerability affecting ImageMagick versions prior to 7.0.8-68, where a missing check for a zero value in the 'replace_extent' parameter can lead to an integer overflow in the SubstituteString() function. This flaw, triggered by a specially crafted input file, could result in a denial of service, impacting application availability. The vulnerability has a CVSS score of 5.5 (AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H), indicating local access, low attack complexity, and high impact on availability, but no impact on confidentiality or integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.9.10-68CPE matchmatch criteria
cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*
>= 7.0.0-0, < 7.0.8-68CPE matchmatch criteria
cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.13%
Probability of exploitation in next 30 days
EPSS Percentile
63.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0113 is in the 74th percentile among its peer group of 5,758 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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 (2)

redhatpatch availablevia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: ImageMagick

Vendor Advisories (1)

redhatCVE-2020-27770Moderate

ImageMagick: unsigned offset overflowed at MagickCore/string.c

Oct 5, 2019

References

bugzilla.redhat.com / show_bug.cgi
ExploitIssue TrackingPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2021/03/msg00030.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2023/03/msg00008.html