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    2 vulnerabilities found for luci-app-adblock-fast by openwrt

    CVE-2026-55159 (GCVE-0-2026-55159)

    Vulnerability from nvd – Published: 2026-09-21 19:24 – Updated: 2026-09-29 14:01
    VLAI
    Title
    luci-app-adblock-fast: Delegated `luci-app-adblock-fast` users can reach root command execution by injecting newline-separated cron entries
    Summary
    luci-app-adblock-fast a WebUI for fast, lightweight DNS-based ad-blocker for OpenWrt that works with dnsmasq, smartdns, or unbound. Prior to 1.2.4-2, the luci.adblock-fast.setCronEntry RPC method accepts an entry argument containing carriage-return or line-feed characters and serializes it into /etc/crontabs/root as though it were one logical line. An authenticated delegated user with the luci-app-adblock-fast write ACL can therefore create an additional physical root cron entry through applications/luci-app-adblock-fast/root/usr/share/rpcd/ucode/luci.adblock-fast, resulting in persistent command execution as UID 0 when cron runs. The issue is not demonstrated for unauthenticated callers or users without the component write ACL. This vulnerability is fixed in 1.2.4-2.
    Severity
    8.8 (High)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-29 14:01 UTC
    CWE
    • CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7632 records in the last 180 days details
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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    CVE-2026-55159 (GCVE-0-2026-55159)

    Vulnerability from cvelistv5 – Published: 2026-09-21 19:24 – Updated: 2026-09-29 14:01
    VLAI
    Title
    luci-app-adblock-fast: Delegated `luci-app-adblock-fast` users can reach root command execution by injecting newline-separated cron entries
    Summary
    luci-app-adblock-fast a WebUI for fast, lightweight DNS-based ad-blocker for OpenWrt that works with dnsmasq, smartdns, or unbound. Prior to 1.2.4-2, the luci.adblock-fast.setCronEntry RPC method accepts an entry argument containing carriage-return or line-feed characters and serializes it into /etc/crontabs/root as though it were one logical line. An authenticated delegated user with the luci-app-adblock-fast write ACL can therefore create an additional physical root cron entry through applications/luci-app-adblock-fast/root/usr/share/rpcd/ucode/luci.adblock-fast, resulting in persistent command execution as UID 0 when cron runs. The issue is not demonstrated for unauthenticated callers or users without the component write ACL. This vulnerability is fixed in 1.2.4-2.
    Severity
    8.8 (High)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-29 14:01 UTC
    CWE
    • CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7632 records in the last 180 days details
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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