Vulnerability Details : CVE-2022-2928
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.
Products affected by CVE-2022-2928
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r10:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r10_b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11_b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc2:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r12:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r12_b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r10_rc1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r12_p1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r13:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r13_b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r14:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r14_b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r15:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r10b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r10rc1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11rc1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11rc2:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r12-p1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r12b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r13b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r14b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r16:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r15-p1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r15_b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r16-p1:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-2928
0.11%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 43 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-2928
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST | |
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
Internet Systems Consortium (ISC) |
CWE ids for CVE-2022-2928
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2022-2928
-
https://security.gentoo.org/glsa/202305-22
ISC DHCP: Multiple Vulnerabilities (GLSA 202305-22) — Gentoo security
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/
[SECURITY] Fedora 37 Update: dhcp-4.4.3-4.P1.fc37 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/
[SECURITY] Fedora 36 Update: dhcp-4.4.3-4.P1.fc36 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://kb.isc.org/docs/cve-2022-2928
CVE-2022-2928 An option refcount overflow exists in dhcpdVendor Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/
[SECURITY] Fedora 35 Update: dhcp-4.4.3-4.P1.fc35 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2022/10/msg00015.html
[SECURITY] [DLA 3146-1] isc-dhcp security updateMailing List;Third Party Advisory
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