CVE-2023-33285

An issue was discovered in Qt 5.x before 5.15.14, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. QDnsLookup has a buffer over-read via a crafted reply from a DNS server.

Published: 2023-05-22 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-33285 is rated Low Risk (30.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.09%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2023-33285

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 0.41% 0.09% -0.31%
2 2025-11-18 0.10% 0.41% +0.31%
3 2025-04-15 — 0.10% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-33285

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L 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:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L 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:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2023-33285

OS Trackers for CVE-2023-33285

vendor priority summary link
debian not yet assigned CVE-2023-33285 not yet assigned priority: Debian including 3 source packages (qt6-base, qtbase-opensource-src, qtbase-opensource-src-gles), 14 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 12, open 2. https://security-tracker.debian.org/tracker/CVE-2023-33285
redhat medium — https://access.redhat.com/security/cve/CVE-2023-33285
suse medium CVE-2023-33285 severity moderate: SUSE including 1064 source package names (adwaita-qt5-1.4.2-1.el9, amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, …), 2307 product×package rows across 97 product lines (Image SLES12-SP5-Azure-SAP-BYOS, Image SLES12-SP5-Azure-SAP-On-Demand, … (97 product lines)): Fixed 1705, Will Not Fix 232, Known Affected 231, Known Not Affected 139. https://www.suse.com/security/cve/CVE-2023-33285/
ubuntu medium CVE-2023-33285 medium priority: Ubuntu including 2 source packages (qt6-base, qtbase-opensource-src), 26 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 12, released 5, needs-triage 4, not-affected 3, DNE 2. https://ubuntu.com/security/CVE-2023-33285

Affected software / configurations for CVE-2023-33285

Vendor Product Version Raw CPE
qt qt >= 5.0.0, < 5.15.4 cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
qt qt >= 6.0.0, < 6.2.9 cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
qt qt >= 6.3.0, < 6.5.1 cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*

References for CVE-2023-33285

cvelogic Threat Intelligence