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Advisories

lrzsz before 0.13.0 OS Command Injection via lrz Pipe Mode

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severity
high
date
Affecting

  • lrzsz >= 0, < 0.13.0

CWE
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS
7.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Tristan Madani
Description
lrzsz before 0.13.0 contains an OS command injection vulnerability in the lrz receive utility's pipe mode that allows remote senders to execute commands by supplying crafted filenames. When lrz runs under a suffixed name such as lrztar, procheader() in src/lrz.c passes the unescaped ZMODEM/YMODEM filename to popen(), so shell metacharacters execute as the receiving user.

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