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Vulnerability DatabaseCVE-2023-25586

CVE-2023-25586: 
NixOS vulnerability analysis and mitigation

Overview

A vulnerability (CVE-2023-25586) was discovered in GNU Binutils, specifically affecting the bfdinitsectiondecompressstatus function. The vulnerability stems from a logic failure that can lead to the use of an uninitialized variable, potentially causing a crash and local denial of service. The issue was disclosed on September 14, 2023, and affects GNU Binutils version 2.40 (NVD, Red Hat).

Technical details

The vulnerability occurs due to a logic fail in the bfdinitsectiondecompressstatus function where a local variable 'chtype' is supposed to be initialized by the bfdcheckcompressionheader function. However, since this function call is inside an 'else if' branch, if the previous 'if' branch is taken, the 'chtype' can remain uninitialized and is directly used to assign sec->compressstatus. The vulnerability has been assigned a CVSS v3.1 base score of 5.5 (Medium) with the vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (Sourceware Bug, NVD).

Impact

When successfully exploited, this vulnerability can cause the application to crash, resulting in a local denial of service (DoS). The impact is limited to availability, with no direct effect on confidentiality or integrity of the system (NetApp Advisory).

Mitigation and workarounds

A fix has been implemented in the upstream repository through commit 5830876a0cca17bef3b2d54908928e72cca53502, which sets the chtype to zero for the zlib-gnu case in the bfdinitsectiondecompress_status function (Sourceware Patch).

Additional resources

Source: This report was generated using AI

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