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    CVE-2019-20454

    An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.

    Published:Jul 28, 2019
    Last Modified:Nov 21, 2024
    EPS:Feb 14, 2020
    EPSS Score:0.00121
    CVSS Score:7.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Pcre
    Product
    Pcre2
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Splunk
    Product
    Universal Forwarder

    Exploits

    https://bugs.php.net/bug.php?id=78338https://bugs.php.net/bug.php?id=78338

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    References

    https://bugs.exim.org/show_bug.cgi?id=2421
    https://bugs.php.net/bug.php?id=78338
    https://bugzilla.redhat.com/show_bug.cgi?id=1735494
    https://lists.debian.org/debian-lts-announce/2023/03/msg00014.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQRAHYHLRNMBTPR3KXVM27NSZP3KTOPI/
    https://security.gentoo.org/glsa/202006-16
    https://vcs.pcre.org/pcre2?view=revision&revision=1092
    https://bugs.exim.org/show_bug.cgi?id=2421
    https://bugs.php.net/bug.php?id=78338
    https://bugzilla.redhat.com/show_bug.cgi?id=1735494
    https://lists.debian.org/debian-lts-announce/2023/03/msg00014.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQRAHYHLRNMBTPR3KXVM27NSZP3KTOPI/
    https://security.gentoo.org/glsa/202006-16
    https://vcs.pcre.org/pcre2?view=revision&revision=1092

    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