Use After Free in Haxx Curl
CVE-2021-22901
curl 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 ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances…
Vulnerability class: Use-After-Free
EPSS: 0.601 (99.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- support@hackerone.com (Exploit, Patch, x_refsource_MISC, Vendor Advisory)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (x_refsource_CONFIRM, Third Party Advisory)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (x_refsource_CONFIRM, Third Party Advisory)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- support@hackerone.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22901?
- CVE-2021-22901 is a high-severity vulnerability in Haxx Curl, classified under Use After Free. CVSS score: 8.1/10. Published 2021-06-11.
- How severe is CVE-2021-22901?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2021-22901 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.