CVE-2024-45802 | Squid Denial of Service

Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to Input Validation, Premature Release of Resource During Expected Lifetime, and Missing Release of Resource after Effective Lifetime bugs, Squid is vulnerable to Denial of Service attacks by a trusted server against all clients using the proxy. This bug is fixed in the default build configuration of Squid version 6.10.

Published: 2024-10-28 Last update: 2025-11-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-45802 is rated Moderate Risk (56.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.95%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2024-45802

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 2026-04-27 1.28% 0.95% -0.34%
2 2026-04-26 1.25% 1.28% +0.03%
3 2026-01-31 — 1.25% —

Full EPSS history (37 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-45802

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
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.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
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.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-45802

OS Trackers for CVE-2024-45802

vendor priority summary link
alpine — CVE-2024-45802: 1 source package rows (squid); 73 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 73. https://security.alpinelinux.org/vuln/CVE-2024-45802
debian not yet assigned CVE-2024-45802 not yet assigned priority: Debian including 1 source packages (squid), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-45802
redhat high — https://access.redhat.com/security/cve/CVE-2024-45802
suse medium CVE-2024-45802 severity moderate: SUSE including 10 source package names (libecap-1.0.1-2.module+el8.9.0+19703+a1da7223, libecap-devel-1.0.1-2.module+el8.9.0+19703+a1da7223, …), 14 product×package rows across 10 product lines (SUSE Liberty Linux 7 LTSS, SUSE Liberty Linux 8, … (10 product lines)): Fixed 9, Known Not Affected 5. https://www.suse.com/security/cve/CVE-2024-45802/
ubuntu medium CVE-2024-45802 medium priority: Ubuntu including 2 source packages (squid, squid3), 16 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream, xenial): DNE 6, ignored 4, needs-triage 3, not-affected 2, released 1. https://ubuntu.com/security/CVE-2024-45802

Affected software / configurations for CVE-2024-45802

Vendor Product Version Raw CPE
squid-cache squid >= 3.0, < 6.10 cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

References for CVE-2024-45802

cvelogic Threat Intelligence