Detections
Analytics
NewStart CGSL MAIN 7.02 : libpng Multiple Vulnerabilities (NS-SA-2026-0100)
high Nessus Plugin ID 343581
Synopsis
The remote NewStart CGSL host is affected by multiple vulnerabilities.Description
The remote NewStart CGSL host, running version MAIN 7.02, has libpng packages installed that are affected by multiple vulnerabilities:- A flaw has been found in pnggroup libpng up to 1.6.55. Affected by this vulnerability is the function do_pnm2png of the file contrib/pngminus/pnm2png.c of the component pnm2png. This manipulation of the argument width/height causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet. (CVE-2026-3713)
- LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer.
The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55. (CVE-2026-25646)
- LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of- bounds memory access. This issue has been patched in version 1.6.51. (CVE-2025-64505)
- LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51. (CVE-2025-64506)
- LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component alpha 257 required by the simplified PNG API. This issue has been patched in version 1.6.51. (CVE-2025-64720)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade the vulnerable CGSL libpng packages. Note that updated packages may not be available yet. Please contact ZTE for more information.See Also
https://security.gd-linux.com/info/CVE-2025-64505
https://security.gd-linux.com/info/CVE-2025-64506
https://security.gd-linux.com/info/CVE-2025-64720
https://security.gd-linux.com/info/CVE-2025-65018
https://security.gd-linux.com/info/CVE-2025-66293
https://security.gd-linux.com/info/CVE-2026-22801
https://security.gd-linux.com/info/CVE-2026-25646
https://security.gd-linux.com/info/CVE-2026-33416
https://security.gd-linux.com/info/CVE-2026-33636
https://security.gd-linux.com/info/CVE-2026-34757
Plugin Details
Severity: High
ID: 343581
File Name: newstart_cgsl_NS-SA-2026-0100_libpng.nasl
Version: 1.1
Type: Local
Published: 9/8/2026
Updated: 9/8/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.7
Percentile: 99.06
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.4
Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:P/A:P
CVSS Score Source: CVE-2026-3713
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.3
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2026-25646
CVSS v4
Risk Factor: High
Base Score: 8.3
Threat Score: 7
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-25646
Vulnerability Information
CPE: cpe:/o:zte:cgsl_main:7, p-cpe:/a:zte:cgsl_main:libpng-core, p-cpe:/a:zte:cgsl_main:libpng-devel, p-cpe:/a:zte:cgsl_main:libpng-doc, p-cpe:/a:zte:cgsl_main:libpng-static, p-cpe:/a:zte:cgsl_main:libpng-tools, p-cpe:/a:zte:cgsl_main:libpng
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/ZTE-CGSL/release, Host/ZTE-CGSL/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/7/2026
Vulnerability Publication Date: 11/11/2025
Reference Information
CVE: CVE-2025-64505, CVE-2025-64506, CVE-2025-64720, CVE-2025-65018, CVE-2025-66293, CVE-2026-22801, CVE-2026-25646, CVE-2026-33416, CVE-2026-33636, CVE-2026-34757, CVE-2026-3713
IAVA: 2025-A-0908-S, 2026-A-0030-S, 2026-A-0135-S, 2026-A-0272-S, 2026-A-0322-S