Race condition in cpio 2.6 and earlier allows local users to modify permissions of arbitrary files via a hard link attack on a file while it is being decompressed, whose permissions are changed by cpio after the decompression is complete.

Threat-Mapped Scoring

Score: 0.0

Priority: Unclassified

EPSS

Score: 0.00075
Percentile: 0.23234

CVSS Scoring

Mapped CWE(s)

• CWE-367 : Time-of-check Time-of-use (TOCTOU) Race Condition
• CWE-59 : Improper Link Resolution Before File Access ('Link Following')

All CAPEC(s)

CAPEC(s) with Mapped TTPs

Mapped ATT&CK TTPs

• T1547.009 : Shortcut Modification
  Kill Chain: persistence
• T1574.005 : Executable Installer File Permissions Weakness
  Kill Chain: persistence
• T1574.010 : Services File Permissions Weakness
  Kill Chain: persistence
• T1027.006 : HTML Smuggling
  Kill Chain: defense-evasion
• T1027.009 : Embedded Payloads
  Kill Chain: defense-evasion
• T1564.009 : Resource Forking
  Kill Chain: defense-evasion

Malware

APTs Threat Group Associations

Campaigns

Affected Products

• cpe:2.3:a:gnu:cpio:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:4.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:5.04:*:*:*:*:*:*:*

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