| Severity | Medium |
| Patch available | NO |
| Number of vulnerabilities | 3 |
| CVE ID | CVE-2019-11479 CVE-2019-11477 CVE-2019-11478 |
| CWE ID | CWE-400 CWE-190 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
TIM 1531 IRC Hardware solutions / Firmware |
| Vendor | Siemens |
Severity: Medium
CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]
CVE-ID: CVE-2019-11479
CWE-ID:
CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to presence of hard-coded MSS value (48 bytes) in the Linux kernel source code. A remote attacker can fragment TCP resend queues significantly more than if a larger MSS were enforced and perform denial of service (DoS) attack.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsTIM 1531 IRC: -
CPE External linkshttps://ics-cert.us-cert.gov/advisories/icsa-19-253-03
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.
Severity: Medium
CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]
CVE-ID: CVE-2019-11477
CWE-ID:
CWE-190 - Integer Overflow or Wraparound
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to integer overflow when handling TCP Selective Acknowledgments (SACKs) due to incorrect processing of TCP_SKB_CB(skb)->tcp_gso_segs value in Linux kernel. A remote non-authenticated attacker can send specially crafted network traffic to the affected system, trigger integer overflow and render the system unavailable.
Successful exploitation of the vulnerability allows a remote attacker to perform denial of service (DoS) attack.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsTIM 1531 IRC: -
CPE External linkshttps://ics-cert.us-cert.gov/advisories/icsa-19-253-03
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.
Severity: Medium
CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]
CVE-ID: CVE-2019-11478
CWE-ID:
CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to an error when processing TCP Selective Acknowledgment (SACK) sequences within the Linux kernel TCP retransmission queue implementation in tcp_fragment. A remote non-authenticated attacker can send specially crafted network traffic to the affected system and perform a denial of service (DoS) attack.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsTIM 1531 IRC: -
CPE External linkshttps://ics-cert.us-cert.gov/advisories/icsa-19-253-03
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.