Debian update for linux
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2023-0386 CVE-2023-31436 CVE-2023-32233 |
| CWE-ID | CWE-264 CWE-787 CWE-416 |
| Exploitation vector | Local |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #3 is available. |
| Vulnerable software |
Debian Linux Operating systems & Components / Operating system linux (Debian package) Operating systems & Components / Operating system package or component |
| Vendor | Debian |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU74410
Risk: Low
CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]
CVE-ID: CVE-2023-0386
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to unauthorized access to execution of setuid files in OverlayFS subsystem when copying a capable file from a nosuid mount into another mount. A local user can execute arbitrary code with root privileges.
Update linux package to version 5.10.179-1.
Vulnerable software versionsDebian Linux: All versions
linux (Debian package): before 5.10.179-1
CPE2.3- cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:linux_debian_package:*:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2023/dsa-5402
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.
2) Out-of-bounds write
EUVDB-ID: #VU76098
Risk: Low
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2023-31436
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
Description The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the qfq_change_class() function in net/sched/sch_qfq.c when handling the MTU value provided to the QFQ Scheduler. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
Update linux package to version 5.10.179-1.
Vulnerable software versionsDebian Linux: All versions
linux (Debian package): before 5.10.179-1
CPE2.3- cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:linux_debian_package:*:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2023/dsa-5402
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Use-after-free
EUVDB-ID: #VU75807
Risk: Low
CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2023-32233
CWE-ID:
CWE-416 - Use After Free
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in Netfilter nf_tables when processing batch requests. A local user can trigger a use-after-free error and execute arbitrary code with root privileges.
Update linux package to version 5.10.179-1.
Vulnerable software versionsDebian Linux: All versions
linux (Debian package): before 5.10.179-1
CPE2.3- cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:linux_debian_package:*:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2023/dsa-5402
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
