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Advisories

libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c

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severity
critical
date
Affecting

  • libssh2 <= 1.11.1, fixed in commit 7acf3df

CWE
  • CWE-680 Integer Overflow to Buffer Overflow
CVSS
9.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Tristan Madani (@TristanInSec)
Description
libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.

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