CVE-2023-35862

Exp

libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c.

Published: 2023-06-19 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-35862 is rated Exploit Available (50.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.10%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-35862

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-35862

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.25% 0.10% -0.15%
2 2025-11-18 0.10% 0.25% +0.15%
3 2025-04-15 — 0.10% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-35862

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2023-35862

OS Trackers for CVE-2023-35862

vendor priority summary link
alpine medium CVE-2023-35862: 1 source package rows (libcoap); 1 state rows across 1 repos (3.18-community); fixed 0, open 1. https://security.alpinelinux.org/vuln/CVE-2023-35862
ubuntu medium CVE-2023-35862 medium priority: Ubuntu including 3 source packages (libcoap, libcoap2, libcoap3), 24 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 12, needs-triage 9, ignored 3. https://ubuntu.com/security/CVE-2023-35862

Affected software / configurations for CVE-2023-35862

Vendor Product Version Raw CPE
libcoap libcoap 4.3.1 cpe:2.3:a:libcoap:libcoap:4.3.1:*:*:*:*:*:*:*

References for CVE-2023-35862

cvelogic Threat Intelligence