Out-of-Bounds Affecting libcilkrts package, versions <0:7.3.1-17.amzn2


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.05% (18th percentile)

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  • Snyk ID SNYK-AMZN2-LIBCILKRTS-5893991
  • published 13 Sep 2023
  • disclosed 13 Sep 2023

How to fix?

Upgrade Amazon-Linux:2 libcilkrts to version 0:7.3.1-17.amzn2 or higher.
This issue was patched in ALAS2-2023-2245.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcilkrts package and not the libcilkrts package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

DISPUTEDA 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.

CVSS Scores

version 3.1
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NVD

4.8 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    None
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Red Hat

4.8 medium
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SUSE

8.1 high