CVE-2020-8231: Use After Free
First published: Tue Aug 11 2020(Updated: )
A flaw was found in libcurl from versions 7.29.0 through 7.71.1. An application that performs multiple requests with libcurl's multi API, and sets the `CURLOPT_CONNECT_ONLY` option, might experience libcurl using the wrong connection. The highest threat from this vulnerability is to data confidentiality.
Credit: support@hackerone.com support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/curl | <0:7.61.1-18.el8 | 0:7.61.1-18.el8 |
| debian/curl | 7.64.0-4+deb10u2 7.64.0-4+deb10u7 7.74.0-1.3+deb11u9 7.74.0-1.3+deb11u10 7.88.1-10+deb12u3 7.88.1-10+deb12u4 8.4.0-2 | |
| debian/curl | <=7.64.0-4+deb10u1<=7.64.0-4<=7.68.0-1 | |
| IBM Cloud Pak for Security (CP4S) | <=1.7.2.0 | |
| IBM Cloud Pak for Security (CP4S) | <=1.7.1.0 | |
| IBM Cloud Pak for Security (CP4S) | <=1.7.0.0 | |
| Haxx Libcurl | >=7.29.0<=7.71.1 | |
| Siemens Sinec Infrastructure Network Services | <1.0.1.1 | |
| Debian Debian Linux | =10.0 | |
| Oracle Communications Cloud Native Core Policy | =1.14.0 | |
| redhat/curl | <7.72.0 | 7.72.0 |
| Splunk Universal Forwarder | >=8.2.0<8.2.12 | |
| Splunk Universal Forwarder | >=9.0.0<9.0.6 | |
| Splunk Universal Forwarder | =9.1.0 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-8231 https://nvd.nist.gov/vuln/detail/CVE-2020-8231
- https://bugzilla.redhat.com/show_bug.cgi?id=1868032
- https://access.redhat.com/errata/RHSA-2021:1610
- https://access.redhat.com/security/cve/cve-2020-8231
- https://curl.haxx.se/docs/CVE-2020-8231.html
- https://github.com/curl/curl/pull/5824
- https://github.com/curl/curl/commit/3c9e021f86872baae412a427e807fbfa2f3e8
- https://security-tracker.debian.org/tracker/CVE-2020-8231
- https://security-tracker.debian.org/tracker/CVE-2020-8169
- https://curl.haxx.se/docs/CVE-2020-8169.html
- https://security-tracker.debian.org/tracker/CVE-2020-8177
- https://curl.haxx.se/docs/CVE-2020-8177.html
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=968831
- https://exchange.xforce.ibmcloud.com/vulnerabilities/186954
- https://www.ibm.com/support/pages/node/6493729 (Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://hackerone.com/reports/948876
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E
- https://security.gentoo.org/glsa/202012-14
- https://www.debian.org/security/2021/dsa-4881
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://github.com/curl/curl/commit/c43127414d
- https://curl.haxx.se/2020-8231.patch
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1870092
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1870093
- https://access.redhat.com/security/cve/CVE-2020-8231
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1683292
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
Frequently Asked Questions
What is CVE-2020-8231?
CVE-2020-8231 is a vulnerability found in libcurl versions 7.29.0 through 7.71.1.
How does CVE-2020-8231 affect applications using libcurl's multi API?
Applications that perform multiple requests using libcurl's multi API and set the CURLOPT_CONNECT_ONLY option might experience libcurl using the wrong connection.
What is the severity of CVE-2020-8231?
The severity of CVE-2020-8231 is high, with a CVSS score of 7.5.
How do I fix CVE-2020-8231?
To fix CVE-2020-8231, upgrade to libcurl version 7.72.0 or higher.
Where can I find more information about CVE-2020-8231?
You can find more information about CVE-2020-8231 at the following references: [link1], [link2], [link3].
- collector/redhat-cve
- collector/security-tracker-debian
- collector/debian-bugs
- alias/CVE-2020-8231
- collector/ibm-support
- collector/nvd-index
- agent/type
- agent/remedy
- agent/first-publish-date
- agent/softwarecombine
- agent/last-modified-date
- collector/redhat-bugzilla
- source/Red Hat
- agent/software-canonical-lookup
- agent/severity
- agent/weakness
- agent/references
- agent/tags
- agent/description
- agent/event
- agent/author
- collector/nvd-api
- source/NVD
- package-manager/redhat
- package-manager/debian
- vendor/ibm
- canonical/ibm cloud pak for security (cp4s)
- version/ibm cloud pak for security (cp4s)/1.7.2.0
- version/ibm cloud pak for security (cp4s)/1.7.1.0
- version/ibm cloud pak for security (cp4s)/1.7.0.0
- vendor/haxx
- canonical/haxx libcurl
- version/haxx libcurl/7.29.0
- version/haxx libcurl/7.71.1
- vendor/siemens
- canonical/siemens sinec infrastructure network services
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- vendor/oracle
- canonical/oracle communications cloud native core policy
- version/oracle communications cloud native core policy/1.14.0
- vendor/splunk
- canonical/splunk universal forwarder
- version/splunk universal forwarder/8.2.0
- version/splunk universal forwarder/9.0.0
- version/splunk universal forwarder/9.1.0