Vulnerabilities > CVE-2022-42898 - Integer Overflow or Wraparound vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."
Vulnerable Configurations
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
- https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583
- https://bugzilla.samba.org/show_bug.cgi?id=15203
- https://web.mit.edu/kerberos/advisories/
- https://www.samba.org/samba/security/CVE-2022-42898.html
- https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
- https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt
- https://web.mit.edu/kerberos/krb5-1.19/
- https://security.netapp.com/advisory/ntap-20230216-0008/
- https://security.netapp.com/advisory/ntap-20230223-0001/
- https://security.gentoo.org/glsa/202309-06
- https://security.gentoo.org/glsa/202310-06