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CVE-2016-3977

20
FAUCET Score

CVE-2016-3977 describes a heap-based buffer overflow in giflib 5.1.2, specifically within the gif2rgb utility, which can be triggered by a specially crafted GIF file's background color index. This vulnerability primarily affects products utilizing giflib, including various openSUSE distributions. With a CVSS score of 5.5 (MEDIUM), it requires local access and user interaction (e.g., opening a malicious GIF) to cause a denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, suggesting it is not a high-profile threat.

Impacted Technologies

VendorProductVersion(s)CPE
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
<= 5.1.2CPE matchmatch criteria
cpe:2.3:a:giflib_project:giflib:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
2.11%
Probability of exploitation in next 30 days
EPSS Percentile
79.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0211 is in the 90th percentile among its peer group of 5,760 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

Vendor Patches (4)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: giflib
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: giflib
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: giflib
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) Operational ToolsFixed in: phantomjs

Vendor Advisories (1)

redhatCVE-2016-3977Low

giflib: heap buffer overflow in gif2rgb

Apr 4, 2016

References

bugs.fi / fuzzing/index.html
lists.opensuse.org / opensuse-updates/2016-04/msg00079.html
lists.opensuse.org / opensuse-updates/2016-04/msg00084.html
lists.opensuse.org / opensuse-updates/2016-05/msg00019.html
bugzilla.redhat.com / show_bug.cgi
sourceforge.net / p/giflib/bugs/87
Patch
sourceforge.net / p/giflib/code/ci/ea8dbc5786862a3e16a5acfa3d24e2c2f608cd88
PatchVendor Advisory
usn.ubuntu.com / 4107-1
securityfocus.com / bid/88103