UBUNTU-CVE-2015-6525

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    UBUNTU-CVE-2015-6525

    Published: 24 Aug 2015Last Modified: 22 Apr 2026
    Upstream:
    CVE-2015-6525
    Aliases:
    USN-2477-1

    Summary:

    Details: Multiple integer overflows in the evbuffer API in Libevent 2.0.x before 2.0.22 and 2.1.x before 2.1.5-beta allow context-dependent attackers to cause a denial of service or possibly have other unspecified impact via "insanely large inputs" to the (1) evbuffer_add, (2) evbuffer_prepend, (3) evbuffer_expand, (4) exbuffer_reserve_space, or (5) evbuffer_read function, which triggers a heap-based buffer overflow or an infinite loop. NOTE: this identifier was SPLIT from CVE-2014-6272 per ADT3 due to different affected versions.

    References: https://ubuntu.com/security/CVE-2015-6525, http://www.debian.org/security/2015/dsa-3119, http://archives.seul.org/libevent/users/Jan-2015/msg00010.html, https://ubuntu.com/security/notices/USN-2477-1, https://www.cve.org/CVERecord?id=CVE-2015-6525

    Affected packages

    Package

    Name: libevent

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.0.21-stable-1ubuntu1.14.04.1

    Affected versions

    2.0.21-stable-1
    2.0.21-stable-1ubuntu1

    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