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Vulnerability DatabaseCVE-2020-27788
CVE-2020-27788:
NixOS vulnerability analysis and mitigation
Overview
An out-of-bounds read access vulnerability was discovered in UPX version 3.96 and earlier in the PackLinuxElf64::canPack() function of plxelf.cpp file. The vulnerability was assigned CVE-2020-27788 and was later fixed in subsequent versions (NVD, Debian Tracker).
Technical details
The vulnerability is classified as CWE-125 (Out-of-bounds Read) and occurs in the PackLinuxElf64::canPack() function when processing ELF files. The issue stems from improper validation of the e_shstrtab section, which could lead to a heap buffer overflow when reading beyond allocated memory (GitHub Issue).
Impact
When exploited, this vulnerability could lead to a heap-buffer-overflow condition, potentially causing program crashes and denial of service. The vulnerability could also potentially lead to information disclosure by allowing attackers to read data outside of intended buffer boundaries (GitHub Issue).
Mitigation and workarounds
The vulnerability was fixed in subsequent versions of UPX through improved validation of the e_shstrtab section. The fix includes better bounds checking for the shstrtab section and improved error handling (GitHub Commit).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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