CVE-2020-8252: Buffer Overflow
First published: Tue Sep 15 2020(Updated: )
Node.js is vulnerable to a buffer overflow, caused by improper bounds checking by the libuv's fs.realpath.native. By sending an overly long argument, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause a denial of service.
Credit: support@hackerone.com support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/rh-nodejs12-nodejs | <0:12.18.4-3.el7 | 0:12.18.4-3.el7 |
| redhat/rh-nodejs10-nodejs | <0:10.23.1-2.el7 | 0:10.23.1-2.el7 |
| redhat/nodejs | <12.18.4 | 12.18.4 |
| redhat/nodejs | <10.22.1 | 10.22.1 |
| redhat/libuv | <1.39.0 | 1.39.0 |
| ubuntu/libuv1 | <1.34.2-1ubuntu1.1 | 1.34.2-1ubuntu1.1 |
| ubuntu/libuv1 | <1.39.0-1 | 1.39.0-1 |
| debian/libuv1 | 1.40.0-2+deb11u1 1.44.2-1+deb12u1 1.48.0-5 | |
| Node.js | >=10.0.0<10.22.1 | |
| Node.js | >=12.0.0<12.18.4 | |
| Node.js | >=14.0.0<14.9.0 | |
| openSUSE | =15.2 | |
| Fedoraproject Fedora | =33 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-8252 https://nvd.nist.gov/vuln/detail/CVE-2020-8252
- https://bugzilla.redhat.com/show_bug.cgi?id=1879315
- https://access.redhat.com/errata/RHSA-2020:4272
- https://access.redhat.com/errata/RHSA-2021:0548
- https://access.redhat.com/errata/RHSA-2020:4903
- https://access.redhat.com/errata/RHSA-2020:5086
- https://access.redhat.com/errata/RHSA-2021:0521
- https://access.redhat.com/security/cve/cve-2020-8252
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00023.html
- https://hackerone.com/reports/965914
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
- https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/
- https://security.gentoo.org/glsa/202009-15
- https://security.netapp.com/advisory/ntap-20201009-0004/
- https://usn.ubuntu.com/4548-1/
- https://launchpad.net/bugs/cve/CVE-2020-8252
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
- https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/#fs-realpath-native-on-may-cause-buffer-overflow-medium-cve-2020-8252
- https://github.com/libuv/libuv/issues/2965
- https://github.com/libuv/libuv/commit/b56d279b172fbe78dee2fb1d29cae9c9c5c6d1c4
- https://github.com/libuv/libuv/commit/0e6e8620496dff0eb285589ef1e37a7f407f3ddd
- https://security-tracker.debian.org/tracker/CVE-2020-8252
- https://github.com/libuv/libuv/pull/2966
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1879335
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1879336
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1879337
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1879338
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1879339
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1879342
- https://exchange.xforce.ibmcloud.com/vulnerabilities/188593
- https://www.ibm.com/support/pages/node/6412707 (Advisory)
- https://ubuntu.com/security/notices/USN-4548-1
- https://www.cve.org/CVERecord?id=CVE-2020-8252
- https://nvd.nist.gov/vuln/detail/CVE-2020-8252
- https://ubuntu.com/security/CVE-2020-8252
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2020-8252?
CVE-2020-8252 is a vulnerability in the realpath() implementation in libuv, which can lead to a potential buffer overflow.
What is the impact of CVE-2020-8252?
The highest threat from CVE-2020-8252 is to data confidentiality and integrity, as well as system availability.
Which software is affected by CVE-2020-8252?
Node.js versions < 10.22.1, < 12.18.4, and < 14.9.0, as well as libuv versions < 1.39.0, are affected by CVE-2020-8252.
How can I fix CVE-2020-8252?
To fix CVE-2020-8252, update Node.js to version 10.22.1, 12.18.4, or 14.9.0, and update libuv to version 1.39.0.
Where can I find more information about CVE-2020-8252?
You can find more information about CVE-2020-8252 on the Node.js and libuv websites.
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