CVE-2021-3905
First published: Wed Nov 03 2021(Updated: )
A memory leak was found in Open vSwitch (OVS) during userspace IP fragmentation processing. An attacker could use this flaw to potentially exhaust available memory by keeping sending packet fragments.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Openvswitch Openvswitch | <2.17.0 | |
| Redhat Enterprise Linux Fast Datapath | =7.0 | |
| Redhat Enterprise Linux Fast Datapath | =8.0 | |
| Canonical Ubuntu Linux | =21.10 | |
| Fedoraproject Fedora | =35 | |
| redhat/openvswitch | <2.12 | 2.12 |
| debian/openvswitch | 2.15.0+ds1-2+deb11u5 3.1.0-2+deb12u1 3.4.0-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2021-3905
- https://bugzilla.redhat.com/show_bug.cgi?id=2019692
- https://github.com/openvswitch/ovs-issues/issues/226
- https://github.com/openvswitch/ovs/commit/803ed12e31b0377c37d7aa8c94b3b92f2081e349
- https://ubuntu.com/security/CVE-2021-3905
- https://security.gentoo.org/glsa/202311-16
- https://launchpad.net/bugs/cve/CVE-2021-3905
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2019693
- https://github.com/openvswitch/ovs/commit/640d4db788eda96bb904abcfc7de2327107bafe1
- https://security-tracker.debian.org/tracker/CVE-2021-3905
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3905
- https://nvd.nist.gov/vuln/detail/CVE-2021-3905
Frequently Asked Questions
What is CVE-2021-3905?
CVE-2021-3905 is a vulnerability in Open vSwitch (OVS) that causes a memory leak during userspace IP fragmentation processing.
What is the severity of CVE-2021-3905?
CVE-2021-3905 has a severity value of 7.5 (high).
How does CVE-2021-3905 impact Open vSwitch?
CVE-2021-3905 can potentially exhaust available memory in Open vSwitch by keeping sending packet fragments.
Which software versions are affected by CVE-2021-3905?
Openvswitch 2.17.0, Redhat Enterprise Linux Fast Datapath 7.0 and 8.0, Canonical Ubuntu Linux 21.10, and Fedoraproject Fedora 35 are affected by CVE-2021-3905.
How can CVE-2021-3905 be fixed?
To fix CVE-2021-3905, it is recommended to update to Openvswitch 2.10.7+ds1-0+deb10u1 or later, Redhat Enterprise Linux Fast Datapath 2.12 or later, or Ubuntu Openvswitch 2.16.0-0ubuntu2.1 or later.
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