UBUNTU-CVE-2019-12495

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    UBUNTU-CVE-2019-12495

    Published: 31 May 2019Last Modified: 22 Apr 2026
    Upstream:
    CVE-2019-12495

    Summary:

    Details: An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to a one-byte out-of-bounds write in the gsym_addr function in x86_64-gen.c. This occurs because tccasm.c mishandles section switches.

    References: https://ubuntu.com/security/CVE-2019-12495, https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.html, https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5, https://www.cve.org/CVERecord?id=CVE-2019-12495

    Affected packages

    Package

    Name: tcc

    Purl: pkg:deb/ubuntu/[email protected]~git20151227.933c223-1?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.9.27~git20140923.9d7fb33-3ubuntu1
    0.9.27~git20151227.933c223-1

    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