CVE-2023-28319
HIGH severity · CVSS 7.5 · Use-after-free
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)2%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://hackerone.com/reports/1913733 ↗
Additional information
- NVD record
- https://hackerone.com/reports/1913733Patch
- http://seclists.org/fulldisclosure/2023/Jul/47Advisory
- http://seclists.org/fulldisclosure/2023/Jul/48Advisory
- http://seclists.org/fulldisclosure/2023/Jul/52Advisory
- https://security.gentoo.org/glsa/202310-12Advisory
- https://security.netapp.com/advisory/ntap-20230609-0009/Advisory
- https://support.apple.com/kb/HT213843Advisory
- https://support.apple.com/kb/HT213844Advisory