CVE-2015-1781

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    CVE-2015-1781

    Published: 28 Sept 2015Last Modified: 16 Apr 2026

    Summary:

    Details: Buffer overflow in the gethostbyname_r and other unspecified NSS functions in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response, which triggers a call with a misaligned buffer.

    References: http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html, http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html, http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html, http://www.debian.org/security/2016/dsa-3480, http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html, http://www.securityfocus.com/bid/74255, http://www.securitytracker.com/id/1032178, http://www.ubuntu.com/usn/USN-2985-1, http://www.ubuntu.com/usn/USN-2985-2, https://rhn.redhat.com/errata/RHSA-2015-0863.html, https://security.gentoo.org/glsa/201602-02, https://sourceware.org/bugzilla/show_bug.cgi?id=18287, https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html, http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html, http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html, http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html, https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html, https://sourceware.org/bugzilla/show_bug.cgi?id=18287, https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=2959eda9272a03386

    Affected packages

    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