SB2020022441 - Out-of-bounds write in FreeRADIUS pam_radius
Published: February 24, 2020 Updated: August 8, 2020
Security Bulletin ID
SB2020022441
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2015-9542)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
add_password in pam_radius_auth.c in pam_radius 1.4.0 does not correctly check the length of the input password, and is vulnerable to a stack-based buffer overflow during memcpy(). An attacker could send a crafted password to an application (loading the pam_radius library) and crash it. Arbitrary code execution might be possible, depending on the application, C library, compiler, and other factors.
Remediation
Install update from vendor's website.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-9542
- https://github.com/FreeRADIUS/pam_radius/commit/01173ec2426627dbb1e0d96c06c3ffa0b14d36d0
- https://lists.debian.org/debian-lts-announce/2020/02/msg00023.html
- https://lists.debian.org/debian-lts-announce/2020/08/msg00000.html
- https://usn.ubuntu.com/4290-1/
- https://usn.ubuntu.com/4290-2/