|Number of vulnerabilities
Red Hat Enterprise Linux Server - TUS
Operating systems & Components / Operating system
cryptsetup (Red Hat package)
Operating systems & Components / Operating system package or component
|Red Hat Inc.
This security bulletin contains one high risk vulnerability.
CWE-787 - Out-of-bounds write
Exploit availability: NoDescription
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
A vulnerability was found in upstream release cryptsetup-2.2.0 where, there's a bug in LUKS2 format validation code, that is effectively invoked on every device/image presenting itself as LUKS2 container. The bug is in segments validation code in file 'lib/luks2/luks2_json_metadata.c' in function hdr_validate_segments(struct crypt_device *cd, json_object *hdr_jobj) where the code does not check for possible overflow on memory allocation used for intervals array (see statement "intervals = malloc(first_backup * sizeof(*intervals));"). Due to the bug, library can be *tricked* to expect such allocation was successful but for far less memory then originally expected. Later it may read data FROM image crafted by an attacker and actually write such data BEYOND allocated memory.Mitigation
Install updates from vendor's website.
Red Hat Enterprise Linux Server - TUS: 8.2
cryptsetup (Red Hat package): before 2.2.2-1.el8_2.1External links
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.