Home/CVE/A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's publ
CVE

CVE-2023-28319

A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's publ

A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's public key using a SHA 256 hash. When this check fails, libcurl would free the memory for the fingerprint before it returns an error message containing the (now freed) hash. This flaw risks inserting sensitive heap-based data into the error message that might be shown to users or otherwise get leaked and revealed.

HIGH · CVSS 7.5 EPSS 0.0032
Act now
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules15 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
CWE-416Use After Free
▤

Affected Products & Versions

10
haxx curl< 8.1.0
apple macos>= 11.0 and < 11.7.9
apple macos>= 12.0 and < 12.6.8
apple macos>= 13.0 and < 13.5
netapp clustered data ontapall versions
netapp ontap antivirus connectorall versions
netapp h300s firmwareall versions
netapp h500s firmwareall versions
⚠

Public Exploits & PoCs

1
pochackerone.com · 1913733hackerone.com
◈

Sigma Hunt Rules

15
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · support@hackerone.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 May 2023 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

12
suse-csafopenSUSE-SU-2024:12940-1
siemens-csafSSA-337522
siemens-csafSSA-943925
suse-csafSUSE-SU-2023:2224-2
msrcCVE-2023-28319
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2023/Jul/47Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/48Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/52Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202310-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20230609-0009/Third Party Advisory
https://support.apple.com/kb/HT213843Third Party Advisory
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