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    CVE-2019-19333

    In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "bits". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.

    Published:Dec 5, 2019
    Last Modified:Nov 21, 2024
    EPS:Dec 6, 2019
    EPSS Score:0.0082
    CVSS Score:9.8

    Affected Products

    Vendor
    Cesnet
    Product
    Libyang
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-41401 (CVSS 7.1) — libyang before 5.2.6 contains a heap use-after-free write vulnerability in lyd_parser_set_data_flags that inco…
    CVE-2026-44673 (CVSS 7.5) — libyang is a YANG data modeling language library. Prior to SO 5.2.15, lyb_read_string() in src/parser_lyb.c co…
    CVE-2023-26917 (CVSS 7.5) — libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_st…
    CVE-2023-26916 (CVSS 5.3) — libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lys_par…
    CVE-2021-28906 (CVSS 7.5) — In function read_yin_leaf() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] is NU…
    CVE-2021-28902 (CVSS 7.5) — In function read_yin_container() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] …
    CVE-2021-28903 (CVSS 7.5) — A stack overflow in libyang <= v1.0.225 can cause a denial of service through function lyxml_parse_mem(). lyxm…
    CVE-2021-28905 (CVSS 7.5) — In function lys_node_free() in libyang <= v1.0.225, it asserts that the value of node->module can't be NULL. B…
    CVE-2021-28904 (CVSS 7.5) — In function ext_get_plugin() in libyang <= v1.0.225, it doesn't check whether the value of revision is NULL. I…
    CVE-2019-19334 (CVSS 9.8) — In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang pars…

    References

    https://access.redhat.com/errata/RHSA-2019:4360
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19333
    https://github.com/CESNET/libyang/commit/f6d684ade99dd37b21babaa8a856f64faa1e2e0d
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
    https://access.redhat.com/errata/RHSA-2019:4360
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19333
    https://github.com/CESNET/libyang/commit/f6d684ade99dd37b21babaa8a856f64faa1e2e0d
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High