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Ubuntu: (CVE-2023-4039): gcc-9 vulnerability

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Ubuntu: (CVE-2023-4039): gcc-9 vulnerability

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/13/2023
Created
11/21/2024
Added
11/19/2024
Modified
11/19/2024

Description

**DISPUTED**A failure in the -fstack-protector feature in GCC-based toolchains that target AArch64 allows an attacker to exploit an existing buffer overflow in dynamically-sized local variables in your application without this being detected. This stack-protector failure only applies to C99-style dynamically-sized local variables or those created using alloca(). The stack-protector operates as intended for statically-sized local variables. The default behavior when the stack-protector detects an overflow is to terminate your application, resulting in controlled loss of availability. An attacker who can exploit a buffer overflow without triggering the stack-protector might be able to change program flow control to cause an uncontrolled loss of availability or to go further and affect confidentiality or integrity. NOTE: The GCC project argues that this is a missed hardening bug and not a vulnerability by itself.

Solution(s)

  • ubuntu-upgrade-gcc-10
  • ubuntu-upgrade-gcc-10-cross
  • ubuntu-upgrade-gcc-11
  • ubuntu-upgrade-gcc-11-cross
  • ubuntu-upgrade-gcc-12
  • ubuntu-upgrade-gcc-12-cross
  • ubuntu-upgrade-gcc-13
  • ubuntu-upgrade-gcc-13-cross-ports
  • ubuntu-upgrade-gcc-9
  • ubuntu-upgrade-gcc-9-cross

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