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NVD / CVE Program· CNA GitHub_M

CVE-2023-32324: OpenPrinting CUPS vulnerable to heap buffer overflow

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.4% (FIRST EPSS); higher than 73.7% of all records.
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: cups (AlmaLinux:8) 1:2.2.6-54.el8_9; cups-client (AlmaLinux:8) 1:2.2.6-54.el8_9; cups-devel (AlmaLinux:8) 1:2.2.6-54.el8_9.
  • Severity is disputed: the assigning authority (CNA) scores it 7.5, NVD 5.5.

Low priority for now. Upgrade to cups (AlmaLinux:8) 1:2.2.6-54.el8_9; cups-client (AlmaLinux:8) 1:2.2.6-54.el8_9; cups-devel (AlmaLinux:8) 1:2.2.6-54.el8_9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

OpenPrinting CUPS is an open source printing system. In versions 2.4.2 and prior, a heap buffer overflow vulnerability would allow a remote attacker to launch a denial of service (DoS) attack. A buffer overflow vulnerability in the function `format_log_line` could allow remote attackers to cause a DoS on the affected system. Exploitation of the vulnerability can be triggered when the configuration file `cupsd.conf` sets the value of `loglevel `to `DEBUG`. No known patches or workarounds exist at time of publication.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 1, 2023
Updated
Jun 17, 2026
EPSS
1.4% · 73th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · GitHub_M
7.5
2.0 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-32324

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
openprintingcups
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • openprinting cupsup to 2.4.2 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenPrinting cups

    • <= 2.4.2affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8cupsbefore 1:2.2.6-54.el8_91:2.2.6-54.el8_9
AlmaLinux:8cups-clientbefore 1:2.2.6-54.el8_91:2.2.6-54.el8_9
AlmaLinux:8cups-develbefore 1:2.2.6-54.el8_91:2.2.6-54.el8_9
AlmaLinux:8cups-filesystembefore 1:2.2.6-54.el8_91:2.2.6-54.el8_9
AlmaLinux:8cups-ipptoolbefore 1:2.2.6-54.el8_91:2.2.6-54.el8_9
AlmaLinux:8cups-libsbefore 1:2.2.6-54.el8_91:2.2.6-54.el8_9
AlmaLinux:8cups-lpdbefore 1:2.2.6-54.el8_91:2.2.6-54.el8_9
AlmaLinux:9cupsbefore 1:2.3.3op2-21.el91:2.3.3op2-21.el9
AlmaLinux:9cups-clientbefore 1:2.3.3op2-21.el91:2.3.3op2-21.el9
AlmaLinux:9cups-develbefore 1:2.3.3op2-21.el91:2.3.3op2-21.el9
AlmaLinux:9cups-filesystembefore 1:2.3.3op2-21.el91:2.3.3op2-21.el9
AlmaLinux:9cups-ipptoolbefore 1:2.3.3op2-21.el91:2.3.3op2-21.el9
AlmaLinux:9cups-libsbefore 1:2.3.3op2-21.el91:2.3.3op2-21.el9
AlmaLinux:9cups-lpdbefore 1:2.3.3op2-21.el91:2.3.3op2-21.el9
AlmaLinux:9cups-printerappbefore 1:2.3.3op2-21.el91:2.3.3op2-21.el9
Alpine:v3.15cupsbefore 2.3.3-r72.3.3-r7
Alpine:v3.16cupsbefore 2.4.2-r12.4.2-r1
Alpine:v3.17cupsbefore 2.4.2-r22.4.2-r2
Alpine:v3.18cupsbefore 2.4.2-r72.4.2-r7
Debian:10cupsbefore 2.2.10-6+deb10u72.2.10-6+deb10u7
Debian:12cupsbefore 2.4.2-3+deb12u12.4.2-3+deb12u1
Debian:13cupsbefore 2.4.2-42.4.2-4
openSUSE:Leap Micro 5.3cupsbefore 2.2.7-150000.3.43.12.2.7-150000.3.43.1
openSUSE:Tumbleweedcupsbefore 2.4.2-5.12.4.2-5.1

+57

Same product

openprinting: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-58060cups has Authentication bypass with AuthType Negotiate
    32Monitor
  • CVE-2023-4504OpenPrinting CUPS/libppd Postscript Parsing Heap Overflow
    28Monitor
  • CVE-2023-34241CUPS vulnerable to use-after-free in cupsdAcceptClient()
    28Monitor

Published before and after this one in the same product

  • Later →CVE-2024-35235Jun 11, 2024 · Cupsd Listen arbitrary chmod 0140777
    27Monitor
  • Later →CVE-2025-58364Sep 11, 2025 · cups: Remote DoS via null dereference
    26Monitor
  • Later →CVE-2025-58436Nov 29, 2025 · OpenPrinting CUPS slow client can halt cupsd, leading to a possible DoS attack
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:cups1:2.3.3op2-21.el9 · AlmaLinux:9Package registry (OSV)
almalinux:cups-client1:2.3.3op2-21.el9 · AlmaLinux:9Package registry (OSV)
almalinux:cups-devel1:2.3.3op2-21.el9 · AlmaLinux:9Package registry (OSV)
almalinux:cups-filesystem1:2.3.3op2-21.el9 · AlmaLinux:9Package registry (OSV)
almalinux:cups-ipptool1:2.3.3op2-21.el9 · AlmaLinux:9Package registry (OSV)
almalinux:cups-libs1:2.3.3op2-21.el9 · AlmaLinux:9Package registry (OSV)
almalinux:cups-lpd1:2.3.3op2-21.el9 · AlmaLinux:9Package registry (OSV)
almalinux:cups-printerapp1:2.3.3op2-21.el9 · AlmaLinux:9Package registry (OSV)
alpine:cups2.3.3-r7 · Alpine:v3.15Package registry (OSV)
debian:cups2.4.2-3+deb12u1 · Debian:12Package registry (OSV)
opensuse:cups2.2.7-150000.3.43.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
red hat:cups1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-client1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-client-debuginfo1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-debuginfo1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-debugsource1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-devel1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-filesystem1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-ipptool1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-ipptool-debuginfo1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-libs-debuginfo1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-lpd1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cups-lpd-debuginfo1:2.3.3op2-21.el9 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
suse:cups1.7.5-20.39.1 · SUSE:OpenStack Cloud 9Package registry (OSV)
suse:cups2.2.7-150000.3.43.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records