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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.053 (92.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.038 · newest: 0.053 · change: +0.016
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 Linux — versions 10.0
- 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
- hackerone.com/reports/948876 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- curl.haxx.se/docs/CVE-2020-8231.html (Patch, Third Party Advisory)
- security.gentoo.org/glsa/202012-14 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2021/dsa-4881 (vendor-advisory, Third Party Advisory)
- lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a4508… (mailing-list, Mailing List, Third Party Advisory)
- lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698… (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf (Patch, Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
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.