CVE Vulnerabilities

CVE-2016-4492

Improper Restriction of Operations within the Bounds of a Memory Buffer

Published: Feb 24, 2017 | Modified: Jul 28, 2017
CVSS 3.x
4.4
MEDIUM
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P
RedHat/V2
2.6 LOW
AV:N/AC:H/Au:N/C:N/I:N/A:P
RedHat/V3
5.3 LOW
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Ubuntu

Buffer overflow in the do_type function in cplus-dem.c in libiberty allows remote attackers to cause a denial of service (segmentation fault and crash) via a crafted binary.

Weakness

The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.

Affected Software

Name Vendor Start Version End Version
Libiberty Gnu * *
Binutils Ubuntu esm-infra/xenial *
Binutils Ubuntu precise *
Binutils Ubuntu precise/esm *
Binutils Ubuntu trusty *
Binutils Ubuntu upstream *
Binutils Ubuntu wily *
Binutils Ubuntu xenial *
Binutils Ubuntu yakkety *
Binutils-h8300-hms Ubuntu artful *
Binutils-h8300-hms Ubuntu bionic *
Binutils-h8300-hms Ubuntu cosmic *
Binutils-h8300-hms Ubuntu devel *
Binutils-h8300-hms Ubuntu disco *
Binutils-h8300-hms Ubuntu eoan *
Binutils-h8300-hms Ubuntu focal *
Binutils-h8300-hms Ubuntu groovy *
Binutils-h8300-hms Ubuntu hirsute *
Binutils-h8300-hms Ubuntu impish *
Binutils-h8300-hms Ubuntu jammy *
Binutils-h8300-hms Ubuntu precise *
Binutils-h8300-hms Ubuntu trusty *
Binutils-h8300-hms Ubuntu wily *
Binutils-h8300-hms Ubuntu xenial *
Binutils-h8300-hms Ubuntu yakkety *
Binutils-h8300-hms Ubuntu zesty *
Gcc-arm-none-eabi Ubuntu artful *
Gcc-arm-none-eabi Ubuntu bionic *
Gcc-arm-none-eabi Ubuntu cosmic *
Gcc-arm-none-eabi Ubuntu trusty *
Gcc-arm-none-eabi Ubuntu wily *
Gcc-arm-none-eabi Ubuntu xenial *
Gcc-arm-none-eabi Ubuntu yakkety *
Gcc-arm-none-eabi Ubuntu zesty *
Gcc-h8300-hms Ubuntu artful *
Gcc-h8300-hms Ubuntu bionic *
Gcc-h8300-hms Ubuntu cosmic *
Gcc-h8300-hms Ubuntu devel *
Gcc-h8300-hms Ubuntu disco *
Gcc-h8300-hms Ubuntu eoan *
Gcc-h8300-hms Ubuntu focal *
Gcc-h8300-hms Ubuntu groovy *
Gcc-h8300-hms Ubuntu hirsute *
Gcc-h8300-hms Ubuntu impish *
Gcc-h8300-hms Ubuntu jammy *
Gcc-h8300-hms Ubuntu precise *
Gcc-h8300-hms Ubuntu trusty *
Gcc-h8300-hms Ubuntu wily *
Gcc-h8300-hms Ubuntu xenial *
Gcc-h8300-hms Ubuntu yakkety *
Gcc-h8300-hms Ubuntu zesty *
Gccxml Ubuntu precise *
Gccxml Ubuntu trusty *
Gccxml Ubuntu wily *
Gccxml Ubuntu xenial *
Gdb Ubuntu esm-infra/xenial *
Gdb Ubuntu precise *
Gdb Ubuntu trusty *
Gdb Ubuntu vivid/stable-phone-overlay *
Gdb Ubuntu vivid/ubuntu-core *
Gdb Ubuntu wily *
Gdb Ubuntu xenial *
Ht Ubuntu artful *
Ht Ubuntu precise *
Ht Ubuntu trusty *
Ht Ubuntu wily *
Ht Ubuntu xenial *
Ht Ubuntu yakkety *
Ht Ubuntu zesty *
Libiberty Ubuntu esm-infra/xenial *
Libiberty Ubuntu trusty *
Libiberty Ubuntu wily *
Libiberty Ubuntu xenial *
Libiberty Ubuntu yakkety *
Nescc Ubuntu artful *
Nescc Ubuntu bionic *
Nescc Ubuntu cosmic *
Nescc Ubuntu devel *
Nescc Ubuntu disco *
Nescc Ubuntu eoan *
Nescc Ubuntu focal *
Nescc Ubuntu groovy *
Nescc Ubuntu hirsute *
Nescc Ubuntu impish *
Nescc Ubuntu jammy *
Nescc Ubuntu trusty *
Nescc Ubuntu wily *
Nescc Ubuntu xenial *
Nescc Ubuntu yakkety *
Nescc Ubuntu zesty *
Sdcc Ubuntu artful *
Sdcc Ubuntu bionic *
Sdcc Ubuntu cosmic *
Sdcc Ubuntu precise *
Sdcc Ubuntu trusty *
Sdcc Ubuntu wily *
Sdcc Ubuntu xenial *
Sdcc Ubuntu yakkety *
Sdcc Ubuntu zesty *
Valgrind Ubuntu esm-infra/xenial *
Valgrind Ubuntu precise *
Valgrind Ubuntu trusty *
Valgrind Ubuntu wily *
Valgrind Ubuntu xenial *
Valgrind Ubuntu yakkety *

Extended Description

Certain languages allow direct addressing of memory locations and do not automatically ensure that these locations are valid for the memory buffer that is being referenced. This can cause read or write operations to be performed on memory locations that may be associated with other variables, data structures, or internal program data. As a result, an attacker may be able to execute arbitrary code, alter the intended control flow, read sensitive information, or cause the system to crash.

Potential Mitigations

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.

  • For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer.

  • Be wary that a language’s interface to native code may still be subject to overflows, even if the language itself is theoretically safe.

  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.

  • Examples include the Safe C String Library (SafeStr) by Messier and Viega [REF-57], and the Strsafe.h library from Microsoft [REF-56]. These libraries provide safer versions of overflow-prone string-handling functions.

  • Run or compile the software using features or extensions that automatically provide a protection mechanism that mitigates or eliminates buffer overflows.

  • For example, certain compilers and extensions provide automatic buffer overflow detection mechanisms that are built into the compiled code. Examples include the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice.

  • Consider adhering to the following rules when allocating and managing an application’s memory:

  • Run or compile the software using features or extensions that randomly arrange the positions of a program’s executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.

  • Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64].

References