Vulnerabilities > CVE-2021-33909 - Integer Overflow or Wraparound vulnerability in multiple products

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
linux
fedoraproject
debian
netapp
oracle
sonicwall
CWE-190
NVD
Published: 2021-07-20
Updated: 2024-11-21

Summary

fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.

Vulnerable Configurations

Part Description Count
OS
Linux
2225
OS
Fedoraproject
1
OS
Debian
2
OS
Sonicwall
4
Application
Netapp
2
Application
Oracle
4
Hardware
Sonicwall
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Forced Integer Overflow
    This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

References