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 public key using a SHA 2

Affected versions

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

• apple macos11.0 and later · before 11.7.9
• apple macos12.0 and later · before 12.6.8
• apple macos13.0 and later · before 13.5
• haxx curlbefore 8.1.0
• netapp clustered data ontapall versions
• netapp h300s firmwareall versions
• netapp h410s firmwareall versions
• netapp h500s firmwareall versions
• netapp h700s firmwareall versions
• netapp ontap antivirus connectorall versions

Versions reported by the vendor

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

• n/a https://github.com/curl/curl

  • Fixed in 8.1.0affected

Package-level exposure

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

Other highest-scoring records for the same primary product.

• CVE-2021-22901curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session t
  51Plan
• CVE-2023-38039When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API.
  47Plan
• CVE-2024-2398HTTP/2 push headers memory-leak
  45Plan

Published before and after this one in the same product

• ← EarlierCVE-2023-27533Mar 30, 2023 · A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on mali
  36Monitor
• ← EarlierCVE-2023-27534Mar 30, 2023 · A path traversal vulnerability exists in curl <8.0.0 SFTP implementation causes the tilde (~) character to be wrongly replaced when used as
  36Monitor
• Later →CVE-2023-28320May 26, 2023 · A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, se
  24Monitor

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.