gsd-2022-2928
Vulnerability from gsd
Modified
2023-12-13 01:19
Details
In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2022-2928",
"description": "In ISC DHCP 4.4.0 -\u003e 4.4.3, ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option\u0027s refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.",
"id": "GSD-2022-2928",
"references": [
"https://www.debian.org/security/2022/dsa-5251",
"https://advisories.mageia.org/CVE-2022-2928.html",
"https://www.suse.com/security/cve/CVE-2022-2928.html",
"https://ubuntu.com/security/CVE-2022-2928"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2022-2928"
],
"details": "In ISC DHCP 4.4.0 -\u003e 4.4.3, ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option\u0027s refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.",
"id": "GSD-2022-2928",
"modified": "2023-12-13T01:19:19.838246Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "security-officer@isc.org",
"DATE_PUBLIC": "2022-10-05T12:01:00.000Z",
"ID": "CVE-2022-2928",
"STATE": "PUBLIC",
"TITLE": "An option refcount overflow exists in dhcpd"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "ISC DHCP",
"version": {
"version_data": [
{
"version_name": "4.4",
"version_value": "4.4.0 through versions before 4.4.3-P1"
},
{
"version_name": "4.1 ESV",
"version_value": "4.1-ESV-R1 through versions before 4.1-ESV-R16-P1"
}
]
}
}
]
},
"vendor_name": "ISC"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "ISC would like to thank VictorV of Cyber Kunlun Lab for discovering and reporting this issue."
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "In ISC DHCP 4.4.0 -\u003e 4.4.3, ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option\u0027s refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort."
}
]
},
"exploit": [
{
"lang": "eng",
"value": "We are not aware of any active exploits."
}
],
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "A DHCP server configured with allow leasequery;, a remote machine with access to the server can send lease queries for the same lease multiple times, leading to the add_option() function being repeatedly called. This could cause an option\u0027s refcount field to overflow and the server to abort. Internally, reference counters are integers and thus overflow at 2^31 references, so even at 1000 lease query responses per second, it would take more than three weeks to crash the server. Affects In ISC DHCP 4.4.0 -\u003e 4.4.3, ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16-P1"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://kb.isc.org/docs/cve-2022-2928",
"refsource": "CONFIRM",
"url": "https://kb.isc.org/docs/cve-2022-2928"
},
{
"name": "[debian-lts-announce] 20221010 [SECURITY] [DLA 3146-1] isc-dhcp security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00015.html"
},
{
"name": "FEDORA-2022-f5a45757df",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/"
},
{
"name": "FEDORA-2022-9ca9a94e28",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/"
},
{
"name": "FEDORA-2022-c4f274a54f",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/"
},
{
"name": "GLSA-202305-22",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202305-22"
}
]
},
"solution": [
{
"lang": "eng",
"value": "Upgrade to the patched release most closely related to your current version of ISC DHCP. These can all be downloaded from https://www.isc.org/downloads. 4.4.3-P1 4.1-ESV-R16-P2"
}
],
"source": {
"discovery": "EXTERNAL"
},
"work_around": [
{
"lang": "eng",
"value": "Disable lease query on the server for DHCPv4 or restart the server periodically."
}
]
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
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}
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"impact": {
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6
}
},
"lastModifiedDate": "2023-05-03T12:16Z",
"publishedDate": "2022-10-07T05:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.