SSA-324955
Vulnerability from csaf_siemens - Published: 2021-05-11 00:00 - Updated: 2023-03-14 00:00Summary
SSA-324955: SAD DNS Attack in Linux Based Products
Notes
Summary
A vulnerability made public under the name SAD DNS affects Domain Name
System resolvers due to a vulnerability in the Linux kernel when
handling ICMP packets. The Siemens products which are affected
are listed below. For more information please see
https://www.saddns.net/.
Siemens has released updates for the affected products and recommends to update to the latest versions.
General Recommendations
As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download:
https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.
Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Additional Resources
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Terms of Use
Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.
{
"document": {
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"csaf_version": "2.0",
"distribution": {
"text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)",
"tlp": {
"label": "WHITE"
}
},
"notes": [
{
"category": "summary",
"text": "A vulnerability made public under the name SAD DNS affects Domain Name \nSystem resolvers due to a vulnerability in the Linux kernel when \nhandling ICMP packets. The Siemens products which are affected\nare listed below. For more information please see \nhttps://www.saddns.net/.\nSiemens has released updates for the affected products and recommends to update to the latest versions.",
"title": "Summary"
},
{
"category": "general",
"text": "As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens\u0027 operational guidelines for Industrial Security (Download: \nhttps://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
"title": "General Recommendations"
},
{
"category": "general",
"text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
"title": "Additional Resources"
},
{
"category": "legal_disclaimer",
"text": "Siemens Security Advisories are subject to the terms and conditions contained in Siemens\u0027 underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter \"License Terms\"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens\u0027 Global Website (https://www.siemens.com/terms_of_use, hereinafter \"Terms of Use\"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.",
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{
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"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-324955.pdf"
},
{
"category": "self",
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"url": "https://cert-portal.siemens.com/productcert/txt/ssa-324955.txt"
},
{
"category": "self",
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}
],
"title": "SSA-324955: SAD DNS Attack in Linux Based Products",
"tracking": {
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],
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},
{
"branches": [
{
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"name": "\u003c V2.2 Update 1",
"product": {
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"product_id": "31",
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},
"vulnerabilities": [
{
"cve": "CVE-2020-25705",
"cwe": {
"id": "CWE-330",
"name": "Use of Insufficiently Random Values"
},
"notes": [
{
"category": "summary",
"text": "A flaw in ICMP packets in the Linux kernel was found to allow to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass source port UDP randomization. Software that relies on UDP source port randomization are indirectly affected as well. Kernel versions before 5.10 may be vulnerable to this issue.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"27",
"28",
"29",
"30",
"31",
"32"
]
},
"remediations": [
{
"category": "mitigation",
"details": "Use name servers inside corporate environments",
"product_ids": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"27",
"28",
"29",
"30",
"31",
"32"
]
},
{
"category": "mitigation",
"details": "Restrict access of CLI and web-based management interfaces for the affected devices to a dedicated layer 2 segment/VLAN and/or controlled by firewall policies at layer 3 where possible",
"product_ids": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"27",
"28",
"29",
"30",
"31",
"32"
]
},
{
"category": "mitigation",
"details": "Disable outgoing ICMP packets by using \"service ACLs\" to implement blocking rules",
"product_ids": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"27",
"28",
"29",
"30",
"31",
"32"
]
},
{
"category": "vendor_fix",
"details": "Update to V2.2.28 or later version",
"product_ids": [
"13",
"14",
"16",
"25",
"26",
"27"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109817067/"
},
{
"category": "vendor_fix",
"details": "Update to V6.4 or later version",
"product_ids": [
"1",
"2",
"3"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109794349/"
},
{
"category": "vendor_fix",
"details": "Update to V3.0 SP1 or later version",
"product_ids": [
"24"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109793790/"
},
{
"category": "vendor_fix",
"details": "Update to V2.1.3 or later version",
"product_ids": [
"4"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109793041/"
},
{
"category": "vendor_fix",
"details": "Update to V8.7.1.3 or later version",
"product_ids": [
"5"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109802805/"
},
{
"category": "vendor_fix",
"details": "Update to V3.3 or later version",
"product_ids": [
"10",
"11"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109799584/"
},
{
"category": "vendor_fix",
"details": "Update to V3.3.46 or later version",
"product_ids": [
"9",
"12",
"29",
"30"
],
"url": "https://support.industry.siemens.com/cs/us/en/view/109812218/"
},
{
"category": "vendor_fix",
"details": "Update to V3.0 or later version",
"product_ids": [
"15"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109800773"
},
{
"category": "vendor_fix",
"details": "Update to V1.1 or later version",
"product_ids": [
"17"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109811116/"
},
{
"category": "vendor_fix",
"details": "Update to V2.2 Update 1 or later version",
"product_ids": [
"31",
"32"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109803672/"
},
{
"category": "vendor_fix",
"details": "Update to V1.6 or later version",
"product_ids": [
"6",
"7"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109803418/"
},
{
"category": "vendor_fix",
"details": "Update to V3.1 or later version",
"product_ids": [
"18",
"19",
"20",
"21",
"22",
"23"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109804366"
},
{
"category": "vendor_fix",
"details": "Update to V3.3 or later version",
"product_ids": [
"8",
"28"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109799604/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.4,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"27",
"28",
"29",
"30",
"31",
"32"
]
}
],
"title": "CVE-2020-25705"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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