Out-of-bounds read in libfetch - CVE-2021-36159
Published: August 25, 2021
Vulnerability identifier: #VU56093
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-36159
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when handling numeric strings for the FTP and HTTP protocols in strtol. A remote attacker can pass specially crafted input to the application, trigger out-of-bounds read error and read contents of memory on the system or perform a denial of service attack.
Affected software
libfetch
FreeBSD
Juniper Cloud Native Router
Junos cRPD
FreeBSD
Juniper Cloud Native Router
Junos cRPD
How to mitigate CVE-2021-36159
Install updates from vendor's website.
libfetch - update to 2021-07-26
Juniper Cloud Native Router - update to 23.4R1
Junos cRPD - update to 23.4R1
Juniper Cloud Native Router - update to 23.4R1
Junos cRPD - update to 23.4R1