Remote DoS and information disclosure in NetBSD
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | N/A |
| CWE-ID | CWE-125 CWE-401 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
NetBSD Operating systems & Components / Operating system |
| Vendor | NetBSD Foundation, Inc |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Out-of-bounds read
EUVDB-ID: #VU5867
Risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists due to insufficient validation of hardware and protocol lengths when processing ARP headers. A remote unauthenticated attacker in one network segment with vulnerable system can send specially crafted ARP packet with the highest encodable lengths and cause the kernel to copy in the reply packet more data than is available. A remote attacker can obtain 249 bytes of kernel memory over an Ethernet link.
Successful exploitation may allow an attacker to obtain potentially sensitive information from kernel memory.
MitigationInstall update from CVS repository.
Vulnerable software versionsNetBSD: 6.0 - 7.0.2
External linkshttp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2017-002.txt.asc
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) Memory leak
EUVDB-ID: #VU5866
Risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to memory leak when processing ARP packets. A remote unauthenticated attacker in one network segment with vulnerable system can send specially crafted ARP requests to vulnerable system, trigger memory leak and consume all available memory resources on the system.
Successful exploitation of the vulnerability may allow an attacker to perform denial of service (DoS) attack.
MitigationInstall update from CVS repository.
Vulnerable software versionsNetBSD: 6.0 - 7.0.2
External linkshttp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2017-002.txt.asc
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.
