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CVE Vulnerabilities

CVE-2018-18311

Integer Overflow or Wraparound

Published: Dec 07, 2018 | Modified: Nov 21, 2024
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.1 IMPORTANT
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2018-18311
CWEhttps://cwe.mitre.org/data/definitions/190.html

Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

Weakness

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Affected Software

NameVendorStart VersionEnd Version
PerlPerl*5.26.3 (excluding)
PerlPerl5.28.0 (including)5.28.1 (excluding)
Red Hat Enterprise Linux 7RedHatperl-4:5.16.3-294.el7_6*
Red Hat Enterprise Linux 7.3 Advanced Update SupportRedHatperl-4:5.16.3-291.el7_3.1*
Red Hat Enterprise Linux 7.3 Telco Extended Update SupportRedHatperl-4:5.16.3-291.el7_3.1*
Red Hat Enterprise Linux 7.3 Update Services for SAP SolutionsRedHatperl-4:5.16.3-291.el7_3.1*
Red Hat Enterprise Linux 7.4 Extended Update SupportRedHatperl-4:5.16.3-292.el7_4.1*
Red Hat Enterprise Linux 7.5 Extended Update SupportRedHatperl-4:5.16.3-292.el7_5.1*
Red Hat Software Collections for Red Hat Enterprise Linux 6RedHatrh-perl524-perl-4:5.24.0-381.el6*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-perl526-perl-4:5.26.3-405.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-perl526-perl-Module-CoreList-1:5.20181130-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-perl524-perl-4:5.24.0-381.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHatrh-perl526-perl-4:5.26.3-405.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHatrh-perl526-perl-Module-CoreList-1:5.20181130-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHatrh-perl524-perl-4:5.24.0-381.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHatrh-perl526-perl-4:5.26.3-405.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHatrh-perl526-perl-Module-CoreList-1:5.20181130-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHatrh-perl524-perl-4:5.24.0-381.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHatrh-perl526-perl-4:5.26.3-405.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHatrh-perl526-perl-Module-CoreList-1:5.20181130-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHatrh-perl524-perl-4:5.24.0-381.el7*
PerlUbuntubionic*
PerlUbuntucosmic*
PerlUbuntudevel*
PerlUbuntuesm-infra-legacy/trusty*
PerlUbuntuesm-infra/bionic*
PerlUbuntuesm-infra/xenial*
PerlUbuntutrusty*
PerlUbuntutrusty/esm*
PerlUbuntuupstream*
PerlUbuntuxenial*

Potential Mitigations

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
  • If possible, choose a language or compiler that performs automatic bounds checking.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
  • Use libraries or frameworks that make it easier to handle numbers without unexpected consequences.
  • Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++). [REF-106]
  • Perform input validation on any numeric input by ensuring that it is within the expected range. Enforce that the input meets both the minimum and maximum requirements for the expected range.
  • Use unsigned integers where possible. This makes it easier to perform validation for integer overflows. When signed integers are required, ensure that the range check includes minimum values as well as maximum values.
  • Understand the programming language’s underlying representation and how it interacts with numeric calculation (CWE-681). Pay close attention to byte size discrepancies, precision, signed/unsigned distinctions, truncation, conversion and casting between types, “not-a-number” calculations, and how the language handles numbers that are too large or too small for its underlying representation. [REF-7]
  • Also be careful to account for 32-bit, 64-bit, and other potential differences that may affect the numeric representation.

References

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