All the vulnerabilites related to ISC - ISC DHCP
cve-2017-3144
Vulnerability from cvelistv5
Published
2019-01-16 20:00
Modified
2024-09-16 22:46
Summary
Failure to properly clean up closed OMAPI connections can exhaust available sockets
References
https://access.redhat.com/errata/RHSA-2018:0158vendor-advisory, x_refsource_REDHAT
https://www.debian.org/security/2018/dsa-4133vendor-advisory, x_refsource_DEBIAN
http://www.securityfocus.com/bid/102726vdb-entry, x_refsource_BID
http://www.securitytracker.com/id/1040194vdb-entry, x_refsource_SECTRACK
https://usn.ubuntu.com/3586-1/vendor-advisory, x_refsource_UBUNTU
https://kb.isc.org/docs/aa-01541x_refsource_CONFIRM
Impacted products
ISCISC DHCP
Show details on NVD website


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cve-2018-5732
Vulnerability from cvelistv5
Published
2019-10-09 14:17
Modified
2024-09-16 18:19
Summary
A specially constructed response from a malicious server can cause a buffer overflow in dhclient
References
https://kb.isc.org/docs/aa-01565x_refsource_CONFIRM
Impacted products
ISCISC DHCP
Show details on NVD website


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cve-2022-2928
Vulnerability from cvelistv5
Published
2022-10-07 04:45
Modified
2024-09-17 00:21
Summary
An option refcount overflow exists in dhcpd
Impacted products
ISCISC DHCP
Show details on NVD website


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              "description": "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",
              "lang": "en",
              "type": "text"
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        }
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        {
          "name": "[debian-lts-announce] 20221010 [SECURITY] [DLA 3146-1] isc-dhcp security update",
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          "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00015.html"
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        },
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          "tags": [
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        },
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          "name": "GLSA-202305-22",
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      ],
      "solutions": [
        {
          "lang": "en",
          "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"
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      ],
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      "title": "An option refcount overflow exists in dhcpd",
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cve-2022-2929
Vulnerability from cvelistv5
Published
2022-10-07 04:45
Modified
2024-09-16 18:28
Summary
DHCP memory leak
Impacted products
ISCISC DHCP
Show details on NVD website


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            }
          ]
        }
      ],
      "credits": [
        {
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          "value": "ISC would like to thank VictorV of Cyber Kunlun Lab for discovering and reporting this issue."
        }
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      "datePublic": "2022-10-05T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "In ISC DHCP 1.0 -\u003e 4.4.3, ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory."
        }
      ],
      "exploits": [
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          "value": "We are not aware of any active exploits."
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      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
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          }
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      ],
      "problemTypes": [
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          "descriptions": [
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              "description": "The function fqdn_universe_decode() allocates buffer space for the contents of option 81 (fqdn) data received in a DHCP packet. The maximum length of a DNS label is 63 bytes. The function tests the length byte of each label contained in the fqdn; if it finds a label whose length byte value is larger than 63, it returns without dereferencing the buffer space. This will cause a memory leak. Affects In ISC DHCP 1.0 -\u003e 4.4.3, ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16-P1",
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          "lang": "en",
          "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"
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cve-2021-25217
Vulnerability from cvelistv5
Published
2021-05-26 22:10
Modified
2024-09-16 22:08
Summary
A buffer overrun in lease file parsing code can be used to exploit a common vulnerability shared by dhcpd and dhclient
Impacted products
ISCISC DHCP
Show details on NVD website


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          },
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            "url": "https://security.netapp.com/advisory/ntap-20220325-0011/"
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          "vendor": "ISC",
          "versions": [
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              "status": "affected",
              "version": "4.4",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Jon Franklin from Dell and Pawel Wieczorkiewicz from Amazon Web Services for (independently) reporting this vulnerability."
        }
      ],
      "datePublic": "2021-05-26T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "In ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16, ISC DHCP 4.4.0 -\u003e 4.4.2 (Other branches of ISC DHCP (i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series) are beyond their End-of-Life (EOL) and no longer supported by ISC. From inspection it is clear that the defect is also present in releases from those series, but they have not been officially tested for the vulnerability), The outcome of encountering the defect while reading a lease that will trigger it varies, according to: the component being affected (i.e., dhclient or dhcpd) whether the package was built as a 32-bit or 64-bit binary whether the compiler flag -fstack-protection-strong was used when compiling In dhclient, ISC has not successfully reproduced the error on a 64-bit system. However, on a 32-bit system it is possible to cause dhclient to crash when reading an improper lease, which could cause network connectivity problems for an affected system due to the absence of a running DHCP client process. In dhcpd, when run in DHCPv4 or DHCPv6 mode: if the dhcpd server binary was built for a 32-bit architecture AND the -fstack-protection-strong flag was specified to the compiler, dhcpd may exit while parsing a lease file containing an objectionable lease, resulting in lack of service to clients. Additionally, the offending lease and the lease immediately following it in the lease database may be improperly deleted. if the dhcpd server binary was built for a 64-bit architecture OR if the -fstack-protection-strong compiler flag was NOT specified, the crash will not occur, but it is possible for the offending lease and the lease which immediately followed it to be improperly deleted."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "We are not aware of any active exploits."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
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      ],
      "problemTypes": [
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              "type": "text"
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        },
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          "url": "https://security.gentoo.org/glsa/202305-22"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of ISC DHCP:\n\n    ISC DHCP 4.1-ESV-R16-P1\n    ISC DHCP 4.4.2-P1"
        }
      ],
      "source": {
        "discovery": "USER"
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      "title": "A buffer overrun in lease file parsing code can be used to exploit a common vulnerability shared by dhcpd and dhclient",
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cve-2018-5733
Vulnerability from cvelistv5
Published
2019-01-16 20:00
Modified
2024-09-17 04:13
Summary
A malicious client can overflow a reference counter in ISC dhcpd
References
https://kb.isc.org/docs/aa-01567x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2018:0469vendor-advisory, x_refsource_REDHAT
https://www.debian.org/security/2018/dsa-4133vendor-advisory, x_refsource_DEBIAN
https://usn.ubuntu.com/3586-2/vendor-advisory, x_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:0483vendor-advisory, x_refsource_REDHAT
https://usn.ubuntu.com/3586-1/vendor-advisory, x_refsource_UBUNTU
http://www.securityfocus.com/bid/103188vdb-entry, x_refsource_BID
http://www.securitytracker.com/id/1040437vdb-entry, x_refsource_SECTRACK
https://lists.debian.org/debian-lts-announce/2018/03/msg00015.htmlmailing-list, x_refsource_MLIST
Impacted products
ISCISC DHCP
Show details on NVD website


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