The remote host is affected by the vulnerability described in GLSA-202305-22 (ISC DHCP: Multiple Vulnerabilities)

  - In ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16, ISC DHCP 4.4.0 -> 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. (CVE-2021-25217)

  - 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. (CVE-2022-2928)

  - In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 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. (CVE-2022-2929)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

GLSA-202305-22 : ISC DHCP: Multiple Vulnerabilities

medium Nessus Plugin ID 175059

Version 1.1

Version 1.0

Version 1.1 Nov 26, 2024, 10:00 AM CVSS metrics ("CVSSv3 score" set to 6.5) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H") CVSSv3 score source (set to "CVE-2022-2929") CVSSv3 severity (based on CVE-2022-2929, severity decreased from "High" to "Medium") Plugin Feed: 202411261000
Version 1.0 May 3, 2023, 9:07 PM New Plugin Feed: 202305032107