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    2 vulnerabilities found for netopeer2 by CESNET

    CVE-2026-63201 (GCVE-0-2026-63201)

    Vulnerability from nvd – Published: 2026-10-30 22:03 – Updated: 2026-11-02 18:08
    VLAI
    Title
    netopeer2-server logging has format string vulnerability via subtree filter
    Summary
    Netopeer2 is a server for implementing network configuration management based on the `NETCONF` Protocol. In affected versions, a low-privileged authenticated `NETCONF` user can remotely crash `netopeer2-server` by sending a `get RPC` with an invalid `subtree filter` whose text contains format specifiers. In `src/netconf.c`, `np2srv_rpc_get_cb()` sends the invalid value through `ERR()` to `np2log_printf()`, where `vsnprintf()` first formats the message safely. In `src/log.c`, that already formatted buffer is subsequently passed to `np2log()` as the format string itself, causing `vsyslog()` to interpret attacker-controlled percent sequences and read invalid pointer arguments. The reported denial of service was confirmed on version 2.8.7 using `NETCONF`-over-SSH and AddressSanitizer; reliable remote code execution was not confirmed. `The advisory identifies 2.8.8 as patched`; repository comparisons verify the fix in public release 2.8.21. The affected/fixed boundary remains unresolved because no public 2.8.8 tag was located, which does not establish the status of an untagged 2.8.8 build.
    Severity
    7.1 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-11-02 17:03 UTC
    CWE
    • CWE-134 - Use of Externally-Controlled Format String
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7984 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    CESNET netopeer2 Affected: < 2.8.21
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-63201 (GCVE-0-2026-63201)

    Vulnerability from cvelistv5 – Published: 2026-10-30 22:03 – Updated: 2026-11-02 18:08
    VLAI
    Title
    netopeer2-server logging has format string vulnerability via subtree filter
    Summary
    Netopeer2 is a server for implementing network configuration management based on the `NETCONF` Protocol. In affected versions, a low-privileged authenticated `NETCONF` user can remotely crash `netopeer2-server` by sending a `get RPC` with an invalid `subtree filter` whose text contains format specifiers. In `src/netconf.c`, `np2srv_rpc_get_cb()` sends the invalid value through `ERR()` to `np2log_printf()`, where `vsnprintf()` first formats the message safely. In `src/log.c`, that already formatted buffer is subsequently passed to `np2log()` as the format string itself, causing `vsyslog()` to interpret attacker-controlled percent sequences and read invalid pointer arguments. The reported denial of service was confirmed on version 2.8.7 using `NETCONF`-over-SSH and AddressSanitizer; reliable remote code execution was not confirmed. `The advisory identifies 2.8.8 as patched`; repository comparisons verify the fix in public release 2.8.21. The affected/fixed boundary remains unresolved because no public 2.8.8 tag was located, which does not establish the status of an untagged 2.8.8 build.
    Severity
    7.1 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-11-02 17:03 UTC
    CWE
    • CWE-134 - Use of Externally-Controlled Format String
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7984 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    CESNET netopeer2 Affected: < 2.8.21
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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