CVE-2023-53570

Description

In the Linux kernel, the following vulnerability has been resolved:wifi: nl80211: fix integer overflow in nl80211_parse_mbssid_elems()nl80211_parse_mbssid_elems() uses a u8 variable num_elems to count thenumber of MBSSID elements in the nested netlink attribute attrs, which canlead to an integer overflow if a user of the nl80211 interface specifies256 or more elements in the corresponding attribute in userspace. Theinteger overflow can lead to a heap buffer overflow as num_elems determinesthe size of the trailing array in elems, and this array is thereafterwritten to for each element in attrs.Note that this vulnerability only affects devices with thewiphy->mbssid_max_interfaces member set for the wireless physical devicestruct in the device driver, and can only be triggered by a process withCAP_NET_ADMIN capabilities.Fix this by checking for a maximum of 255 elements in attrs.

Risk Information

Base Score

7.8

MODERATE

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score

Exploitation Probability

0.011

Associated Vulnerability

No records found

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234