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CVE-2023-43907

22
FAUCET Score

CVE-2023-43907 describes a global buffer overflow vulnerability in OptiPNG v0.7.7, specifically within the 'buffer' variable in gifread.c. This high-severity flaw (CVSS 7.8) can be exploited locally through user interaction, potentially leading to high impact on confidentiality, integrity, and availability. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and there is minimal community discussion or media coverage, the vulnerability remains a significant risk due to its potential for severe consequences if exploited.

Impacted Technologies

VendorProductVersion(s)CPE
0.7.7CPE matchmatch criteria
cpe:2.3:a:optipng_project:optipng:0.7.7:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.52%
Probability of exploitation in next 30 days
EPSS Percentile
41.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0052 is in the 40th percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc
Product: azl3 optipng 0.7.8-5 on Azure Linux 3.0Fixed in: 0.7.8-5

Vendor Advisories (2)

microsoft2023-Oct/CVE-2023-43907Important

OptiPNG v0.7.7 was discovered to contain a global buffer overflow via the 'buffer' variable at gifread.c.

Oct 10, 2023
redhatCVE-2023-43907Moderate

optipng: global buffer overflow via the 'buffer' variable at gifread.c.

Oct 1, 2023

References

optipng.sourceforge.net
Product
github.com / Frank-Z7/z-vulnerabilitys/blob/main/optipng-global-buffer-overflow1/optipng-global-buffer-overflow1.md
ExploitThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/IBHVG5LDE2K3FZSIK4XFXOUXSE7NZ5JH
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/RCG5CMDT37WCZGAWQNOIPVP4VHGCPUU3
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/VAB22JXDE7O27DYARZXC7PFUETM5OOT5
sourceforge.net / projects/optipng/files/OptiPNG/optipng-0.7.7/optipng-0.7.7.tar.gz/download
Product