UBUNTU-CVE-2018-12387

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    UBUNTU-CVE-2018-12387

    Published: 3 Oct 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-12387
    Aliases:
    USN-3778-1

    Summary:

    Details: A vulnerability where the JavaScript JIT compiler inlines Array.prototype.push with multiple arguments that results in the stack pointer being off by 8 bytes after a bailout. This leaks a memory address to the calling function which can be used as part of an exploit inside the sandboxed content process. This vulnerability affects Firefox ESR < 60.2.2 and Firefox < 62.0.3.

    References: https://ubuntu.com/security/CVE-2018-12387, https://www.mozilla.org/en-US/security/advisories/mfsa2018-24/#CVE-2018-12387, https://ubuntu.com/security/notices/USN-3778-1, https://www.cve.org/CVERecord?id=CVE-2018-12387

    Affected packages

    Package

    Name: firefox

    Purl: pkg:deb/ubuntu/[email protected]+build1-0ubuntu0.14.04.2?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -62.0.3+build1-0ubuntu0.14.04.2

    Affected versions

    24.0+build1-0ubuntu1

    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