CVE-2026-43623
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
microtar through 0.1.0 contains a stack-based buffer overflow vulnerability in the raw_to_header() function in src/microtar.c that allows attackers to corrupt adjacent stack memory by supplying a crafted TAR archive with non-null-terminated name or linkname fields. The function uses strcpy() to copy 100-byte ustar format fields that lack null terminators, causing writes of up to 355 bytes into a 100-byte destination buffer when mtar_open(), mtar_find(), or mtar_read_header() process attacker-supplied TAR archives.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| rxi | microtar | 0 <= 0.1.0 | affected |
Weaknesses
- CWE-121: Stack-based Buffer Overflow
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: total
References
- https://github.com/rxi/microtar/issues/28
- https://github.com/rxi/microtar/issues/29
- https://github.com/rxi/microtar/issues/30
- https://www.vulncheck.com/advisories/microtar-stack-based-buffer-overflow-via-raw-to-header
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