A heap-based buffer overflow was discovered in upx, during the variable 'bucket' points to an inaccessible address. The issue is being triggered in the function PackLinuxElf64::invert_pt_dynamic at p_lx_elf.cpp:5239.
Published 2023-03-24 20:15:08
Updated 2023-03-28 18:06:01
View at NVD,   CVE.org
Vulnerability category: OverflowMemory Corruption

Exploit prediction scoring system (EPSS) score for CVE-2021-43312

0.07%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 30 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-43312

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
NIST

CWE ids for CVE-2021-43312

  • The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
    Assigned by: patrick@puiterwijk.org (Secondary)
  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-43312

  • https://github.com/upx/upx/issues/379
    [bug] heap buffer overflow in PackLinuxElf64::invert_pt_dynamic at p_lx_elf.cpp:5239 · Issue #379 · upx/upx · GitHub
    Exploit;Issue Tracking;Patch

Products affected by CVE-2021-43312

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