cve-2022-2929
Vulnerability from cvelistv5
Published
2022-10-07 04:45
Modified
2024-09-16 18:28
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
DHCP memory leak
References
security-officer@isc.orghttps://kb.isc.org/docs/cve-2022-2929Vendor Advisory
security-officer@isc.orghttps://lists.debian.org/debian-lts-announce/2022/10/msg00015.htmlMailing List, Third Party Advisory
security-officer@isc.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/
security-officer@isc.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/
security-officer@isc.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/
security-officer@isc.orghttps://security.gentoo.org/glsa/202305-22
Impacted products
ISCISC DHCP
Show details on NVD website

To clipboard 

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            "name": "[debian-lts-announce] 20221010 [SECURITY] [DLA 3146-1] isc-dhcp security update",
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    "cna": {
      "affected": [
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          "product": "ISC DHCP",
          "vendor": "ISC",
          "versions": [
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              "version": "1.0 through versions before 4.1-ESV-R16-P2"
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          "lang": "en",
          "value": "ISC would like to thank VictorV of Cyber Kunlun Lab for discovering and reporting this issue."
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          "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."
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            "userInteraction": "NONE",
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      "problemTypes": [
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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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      "solutions": [
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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"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "DHCP memory leak",
      "workarounds": [
        {
          "lang": "en",
          "value": "As exploiting this vulnerability requires an attacker to send packets for an extended period of time, restarting servers periodically could be a viable workaround."
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    "dateReserved": "2022-08-22T00:00:00",
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  }
}


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