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    4 vulnerabilities by any1

    CVE-2026-42859 (GCVE-0-2026-42859)

    Vulnerability from nvd – Published: 2026-05-11 17:36 – Updated: 2026-05-11 18:22
    VLAI
    Title
    Neat VNC: Buffer overflow due to oversized RSA public keys
    Summary
    Neat VNC is a VNC server library. Prior to 0.9.6, a pre-authentication stack buffer overflow exists in neatvnc in the RSA-AES security type handler. An unauthenticated remote attacker who can reach the VNC listening socket can send a crafted security type 5 (RSA-AES) or security type 129 (RSA-AES-256) handshake with an oversized client RSA public key, causing rsa_aes_send_challenge in src/auth/rsa-aes.c to overflow a 1024-byte on-stack buffer when encrypting the server challenge. This results in at least a denial of service via server crash. This vulnerability is fixed in 0.9.6.
    Severity
    8.1 (High)
    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:U
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
    Assigner
    References
    Impacted products
    Vendor Product Version
    any1 neatvnc Affected: < 0.9.6
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2024-42458 (GCVE-0-2024-42458)

    Vulnerability from nvd – Published: 2024-08-02 00:00 – Updated: 2024-08-07 15:20
    VLAI
    Summary
    server.c in Neat VNC (aka neatvnc) before 0.8.1 does not properly validate the security type, a related issue to CVE-2006-2369.
    Severity
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • n/a
    • CWE-20 - Improper Input Validation
    Assigner
    References
    Impacted products
    Vendor Product Version
    any1 neatvnc Affected: 0 , < 0.8.1 (custom)
        cpe:2.3:a:any1:neatvnc:*:*:*:*:*:*:*:*
    		 Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-42859 (GCVE-0-2026-42859)

    Vulnerability from cvelistv5 – Published: 2026-05-11 17:36 – Updated: 2026-05-11 18:22
    VLAI
    Title
    Neat VNC: Buffer overflow due to oversized RSA public keys
    Summary
    Neat VNC is a VNC server library. Prior to 0.9.6, a pre-authentication stack buffer overflow exists in neatvnc in the RSA-AES security type handler. An unauthenticated remote attacker who can reach the VNC listening socket can send a crafted security type 5 (RSA-AES) or security type 129 (RSA-AES-256) handshake with an oversized client RSA public key, causing rsa_aes_send_challenge in src/auth/rsa-aes.c to overflow a 1024-byte on-stack buffer when encrypting the server challenge. This results in at least a denial of service via server crash. This vulnerability is fixed in 0.9.6.
    Severity
    8.1 (High)
    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:U
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
    Assigner
    References
    Impacted products
    Vendor Product Version
    any1 neatvnc Affected: < 0.9.6
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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    CVE-2024-42458 (GCVE-0-2024-42458)

    Vulnerability from cvelistv5 – Published: 2024-08-02 00:00 – Updated: 2024-08-07 15:20
    VLAI
    Summary
    server.c in Neat VNC (aka neatvnc) before 0.8.1 does not properly validate the security type, a related issue to CVE-2006-2369.
    Severity
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • n/a
    • CWE-20 - Improper Input Validation
    Assigner
    References
    Impacted products
    Vendor Product Version
    any1 neatvnc Affected: 0 , < 0.8.1 (custom)
        cpe:2.3:a:any1:neatvnc:*:*:*:*:*:*:*:*
    		 Create a notification for this product.
    Show details on NVD website
    To clipboard 

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