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CVE Vulnerabilities

CVE-2018-12362

Integer Overflow or Wraparound

Published: Oct 18, 2018 | Modified: Nov 21, 2024
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.8 IMPORTANT
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2018-12362
CWEhttps://cwe.mitre.org/data/definitions/190.html

An integer overflow can occur during graphics operations done by the Supplemental Streaming SIMD Extensions 3 (SSSE3) scaler, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.

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 can introduce other weaknesses when the calculation is used for resource management or execution control.

Affected Software

Name Vendor Start Version End Version
Enterprise_linux_desktop Redhat 6.0 (including) 6.0 (including)
Enterprise_linux_desktop Redhat 7.0 (including) 7.0 (including)
Enterprise_linux_server Redhat 6.0 (including) 6.0 (including)
Enterprise_linux_server Redhat 7.0 (including) 7.0 (including)
Enterprise_linux_server_aus Redhat 7.6 (including) 7.6 (including)
Enterprise_linux_server_eus Redhat 7.5 (including) 7.5 (including)
Enterprise_linux_server_eus Redhat 7.6 (including) 7.6 (including)
Enterprise_linux_server_tus Redhat 7.6 (including) 7.6 (including)
Enterprise_linux_workstation Redhat 6.0 (including) 6.0 (including)
Enterprise_linux_workstation Redhat 7.0 (including) 7.0 (including)
Red Hat Enterprise Linux 6 RedHat firefox-0:60.1.0-5.el6 *
Red Hat Enterprise Linux 6 RedHat thunderbird-0:52.9.1-1.el6 *
Red Hat Enterprise Linux 7 RedHat firefox-0:60.1.0-4.el7_5 *
Red Hat Enterprise Linux 7 RedHat thunderbird-0:52.9.1-1.el7_5 *
Firefox Ubuntu artful *
Firefox Ubuntu bionic *
Firefox Ubuntu devel *
Firefox Ubuntu trusty *
Firefox Ubuntu upstream *
Firefox Ubuntu xenial *
Thunderbird Ubuntu artful *
Thunderbird Ubuntu bionic *
Thunderbird Ubuntu devel *
Thunderbird Ubuntu trusty *
Thunderbird Ubuntu upstream *
Thunderbird Ubuntu xenial *

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.
  • 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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