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CVE-2022-2928

MEDIUM
Published 2022-10-07T04:45:11.751554Z
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CVSS Score

V3.1
6.5
/10
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.000
probability
of exploitation in the wild

There is a 0.0% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.117
Higher than 11.7% of all CVEs

Attack Vector Metrics

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Description

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

ISC

ISC DHCP

Affected Versions:

4.4.0 through versions before 4.4.3-P1 4.1 ESV 4.1-ESV-R1 through versions before 4.1-ESV-R16-P1

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-5fp7-mmwq-gvmw

Advisory 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.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2022-2928
WEB https://kb.isc.org/docs/cve-2022-2928
WEB https://lists.debian.org/debian-lts-announce/2022/10/msg00015.html
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX
WEB https://security.gentoo.org/glsa/202305-22

Advisory provided by GitHub Security Advisory Database. Published: October 7, 2022, Modified: October 13, 2022

References

https://kb.isc.org/docs/cve-2022-2928
https://lists.debian.org/debian-lts-announce/2022/10/msg00015.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/
https://security.gentoo.org/glsa/202305-22
Published: 2022-10-07T04:45:11.751554Z
Last Modified: 2024-09-17T00:21:40.167Z
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