Debian update for linux
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2018-15471 CVE-2018-18021 |
| CWE-ID | CWE-190 CWE-20 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Debian Linux Operating systems & Components / Operating system |
| Vendor | Debian |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Integer overflow
EUVDB-ID: #VU14475
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-15471
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows an adjacent attacker to gain elevated privileges on the target system.
The vulnerability exists in xenvif_set_hash_mapping in drivers/net/xen-netback/hash.c due to integer overflow when handling malicious input. An adjacent attacker can supply a malicious or buggy frontend request to set or change mapping of requests to request queues, cause the (usually privileged) backend to make out of bounds memory accesses and gain access to arbitrary data, cause the service to crash or gain elevated privileges.
MitigationUpdate the affected package to version: 4.9.110-3+deb9u6
Vulnerable software versionsDebian Linux: All versions
External linkshttp://www.debian.org/security/2018/dsa-4313
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Improper input validation
EUVDB-ID: #VU15177
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-18021
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The vulnerability exists in the arch/arm64/kvm/guest.c source code file due to the mishandling of the sanity check for the KVM_SET_ON_REG IOCTL function. A local attacker can create a malicious Kernel-based Virtual Machine (KVM), cause an illegal exception return and cause the system to crash.
MitigationUpdate the affected package to version: 4.9.110-3+deb9u6
Vulnerable software versionsDebian Linux: All versions
External linkshttp://www.debian.org/security/2018/dsa-4313
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.
