High severity · published Jul 20, 2023
CVE-2022-28733
Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value
8.1
CVSS
1.3%
EPSS
No
On KEV
Description
Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Grub2 · Gnu
2.00 before 2.06-3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-28733
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-28733
Third Party Advisory
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28733
security.netapp.com
https://security.netapp.com/advisory/ntap-20230825-0002/
Mailing List
https://www.openwall.com/lists/oss-security/2022/06/07/5
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