UBUNTU-CVE-2017-8923

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    UBUNTU-CVE-2017-8923

    Published: 12 May 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-8923

    Summary:

    Details: The zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string.

    References: https://ubuntu.com/security/CVE-2017-8923, https://ubuntu.com/security/notices/USN-5300-1, https://ubuntu.com/security/notices/USN-5300-2, https://ubuntu.com/security/notices/USN-5300-3, https://www.cve.org/CVERecord?id=CVE-2017-8923

    Affected packages

    Package

    Name: php5

    Purl: pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu4.29+esm16?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    5.5.3+dfsg-1ubuntu2
    5.5.3+dfsg-1ubuntu3
    5.5.6+dfsg-1ubuntu1
    5.5.6+dfsg-1ubuntu2
    5.5.8+dfsg-2ubuntu1
    5.5.9+dfsg-1ubuntu1
    5.5.9+dfsg-1ubuntu2
    5.5.9+dfsg-1ubuntu3
    5.5.9+dfsg-1ubuntu4
    5.5.9+dfsg-1ubuntu4.1
    5.5.9+dfsg-1ubuntu4.2
    5.5.9+dfsg-1ubuntu4.3
    5.5.9+dfsg-1ubuntu4.4
    5.5.9+dfsg-1ubuntu4.5
    5.5.9+dfsg-1ubuntu4.6
    5.5.9+dfsg-1ubuntu4.7
    5.5.9+dfsg-1ubuntu4.9
    5.5.9+dfsg-1ubuntu4.11
    5.5.9+dfsg-1ubuntu4.12
    5.5.9+dfsg-1ubuntu4.13
    5.5.9+dfsg-1ubuntu4.14
    5.5.9+dfsg-1ubuntu4.16
    5.5.9+dfsg-1ubuntu4.17
    5.5.9+dfsg-1ubuntu4.19
    5.5.9+dfsg-1ubuntu4.20
    5.5.9+dfsg-1ubuntu4.21
    5.5.9+dfsg-1ubuntu4.22
    5.5.9+dfsg-1ubuntu4.23
    5.5.9+dfsg-1ubuntu4.24
    5.5.9+dfsg-1ubuntu4.25
    5.5.9+dfsg-1ubuntu4.26
    5.5.9+dfsg-1ubuntu4.27
    5.5.9+dfsg-1ubuntu4.29
    5.5.9+dfsg-1ubuntu4.29+esm1
    5.5.9+dfsg-1ubuntu4.29+esm2
    5.5.9+dfsg-1ubuntu4.29+esm3
    5.5.9+dfsg-1ubuntu4.29+esm4
    5.5.9+dfsg-1ubuntu4.29+esm5
    5.5.9+dfsg-1ubuntu4.29+esm6
    5.5.9+dfsg-1ubuntu4.29+esm8
    5.5.9+dfsg-1ubuntu4.29+esm10
    5.5.9+dfsg-1ubuntu4.29+esm11
    5.5.9+dfsg-1ubuntu4.29+esm12
    5.5.9+dfsg-1ubuntu4.29+esm13
    5.5.9+dfsg-1ubuntu4.29+esm14
    5.5.9+dfsg-1ubuntu4.29+esm15
    5.5.9+dfsg-1ubuntu4.29+esm16

    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