Use After Free in Haxx Libcurl
CVE-2020-8231
Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.
Vulnerability class: Use-After-Free
EPSS: 0.037 (88.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Haxx Libcurl
- Oracle Communications_cloud_native_core_policy — versions 1.14.0
- Siemens Sinec_infrastructure_network_services
- Splunk Universal_forwarder — versions 9.1.0
- Debian Debian_linux — versions 10.0
- N/a Https://github.com/curl/curl — versions libcurl 7.29.0 to and including 7.71.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support@hackerone.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- support@hackerone.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- support@hackerone.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- support@hackerone.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8231?
- CVE-2020-8231 is a high-severity vulnerability in Haxx Libcurl, classified under Use After Free. CVSS score: 7.5/10. Published 2020-12-14.
- How severe is CVE-2020-8231?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-8231 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.