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    CVE-2016-5180

    Heap-based buffer overflow in the ares_create_query function in c-ares 1.x before 1.12.0 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly execute arbitrary code via a hostname with an escaped trailing dot.

    Published:Sep 29, 2016
    Last Modified:Apr 12, 2025
    EPS:Oct 3, 2016
    EPSS Score:0.21619
    CVSS Score:9.8

    Affected Products

    Vendor
    C-ares
    Product
    C-ares
    Vendor
    C-ares Project
    Product
    C-ares
    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Nodejs
    Product
    Node.js
    Vendor
    Redhat
    Product
    Rhel Software Collections

    Exploits

    https://github.com/pouriam23/CVE-2016-5180https://github.com/pouriam23/CVE-2016-5180-docker-https://github.com/pouriam23/final-CVE-2016-5180

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-33630 (CVSS 7.5) — c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-…
    CVE-2025-62408 (CVSS 5.9) — c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5 terminate a query after maximum at…
    CVE-2024-25629 (CVSS 4.4) — c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration …
    CVE-2020-22217 (CVSS 5.9) — Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_pa…
    CVE-2023-32067 (CVSS 7.5) — c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver se…
    CVE-2020-14354 (CVSS 3.3) — A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is called prior to ar…
    CVE-2017-1000381 (CVSS 7.5) — The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could be triggered …

    References

    http://rhn.redhat.com/errata/RHSA-2017-0002.html
    http://www.debian.org/security/2016/dsa-3682
    http://www.securityfocus.com/bid/93243
    http://www.ubuntu.com/usn/USN-3143-1
    https://c-ares.haxx.se/CVE-2016-5180.patch
    https://c-ares.haxx.se/adv_20160929.html
    https://googlechromereleases.blogspot.in/2016/09/stable-channel-updates-for-chrome-os.html
    https://security.gentoo.org/glsa/201701-28
    https://source.android.com/security/bulletin/2017-01-01.html
    http://rhn.redhat.com/errata/RHSA-2017-0002.html
    http://www.debian.org/security/2016/dsa-3682
    http://www.securityfocus.com/bid/93243
    http://www.ubuntu.com/usn/USN-3143-1
    https://c-ares.haxx.se/CVE-2016-5180.patch
    https://c-ares.haxx.se/adv_20160929.html
    https://googlechromereleases.blogspot.in/2016/09/stable-channel-updates-for-chrome-os.html
    https://security.gentoo.org/glsa/201701-28
    https://source.android.com/security/bulletin/2017-01-01.html

    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