OpenBSD update for libpng
| Risk | Critical |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2025-64505 CVE-2025-64506 CVE-2025-64720 CVE-2025-65018 |
| CWE-ID | CWE-125 CWE-122 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #4 is available. |
| Vulnerable software |
OpenBSD Operating systems & Components / Operating system |
| Vendor | OpenBSD |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Out-of-bounds read
EUVDB-ID: #VU118780
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2025-64505
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the png_do_quantize function when processing PNG files with malformed palette indices. A remote attacker can pass a specially crafted image file to the application, trigger an out-of-bounds read error and read contents of memory on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsOpenBSD: 7.8
CPE2.3 External linkshttps://www.openbsd.org/errata78.html#008
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Out-of-bounds read
EUVDB-ID: #VU118779
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2025-64506
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the png_write_image_8bit() function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. A remote attacker can pass a specially crafted image file to the application, trigger an out-of-bounds read error and read contents of memory on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsOpenBSD: 7.8
CPE2.3 External linkshttps://www.openbsd.org/errata78.html#008
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Out-of-bounds read
EUVDB-ID: #VU118778
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2025-64720
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the png_image_read_composite() function when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. A remote attacker can pass a specially crafted image file to the application, trigger an out-of-bounds read error and read contents of memory on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsOpenBSD: 7.8
CPE2.3 External linkshttps://www.openbsd.org/errata78.html#008
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Heap-based buffer overflow
EUVDB-ID: #VU118777
Risk: Critical
CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Red]
CVE-ID: CVE-2025-65018
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the png_image_finish_read() function when processing 16-bit interlaced PNGs with 8-bit output format. A remote attacker can pass a specially crafted image file to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall update from vendor's website.
Vulnerable software versionsOpenBSD: 7.8
CPE2.3 External linkshttps://www.openbsd.org/errata78.html#008
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
