CVE-2021-3592
First published: Thu Jun 10 2021(Updated: )
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the bootp_input() function and could occur while processing a udp packet that is smaller than the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of uninitialized heap memory from the host. The highest threat from this vulnerability is to data confidentiality.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libslirp | <4.6.0 | 4.6.0 |
| libslirp | <4.6.0 | |
| Red Hat Enterprise Linux | =8.0 | |
| Red Hat Enterprise Linux | =8.0 | |
| Debian Linux | =9.0 | |
| Red Hat Fedora | =33 | |
| Red Hat Fedora | =34 | |
| debian/libslirp | 4.4.0-1+deb11u2 4.7.0-1 4.8.0-1 | |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u12 1:9.2.2+ds-1 1:10.0.0~rc1+ds-2 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-3592 https://nvd.nist.gov/vuln/detail/CVE-2021-3592
- https://bugzilla.redhat.com/show_bug.cgi?id=1970484
- https://access.redhat.com/errata/RHSA-2021:4191
- https://access.redhat.com/security/cve/cve-2021-3592
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
- https://lists.debian.org/debian-lts-announce/2021/09/msg00004.html
- https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI/
- https://security.gentoo.org/glsa/202107-44
- https://security.netapp.com/advisory/ntap-20210805-0004/
- https://launchpad.net/bugs/cve/CVE-2021-3592
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI/
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/93e645e7
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/f13cad45
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/2eca0838
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1972246
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1972249
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1972244
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/93e645e72a056ec0b2c16e0299fc5c6b94e4ca17
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/f13cad45b25d92760bb0ad67bec0300a4d7d5275
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/2eca0838eee1da96204545e22cdaed860d9d7c6c
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/c9f314f6e315a5518432761fea864196a290f799
- https://security-tracker.debian.org/tracker/CVE-2021-3592
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3592
- https://nvd.nist.gov/vuln/detail/CVE-2021-3592
- https://ubuntu.com/security/CVE-2021-3592
Frequently Asked Questions
What is CVE-2021-3592?
CVE-2021-3592 is an invalid pointer initialization issue found in the SLiRP networking implementation of QEMU.
How does CVE-2021-3592 occur?
CVE-2021-3592 occurs in the bootp_input() function while processing a udp packet that is smaller than the size of the 'bootp_t' structure.
What is the severity of CVE-2021-3592?
CVE-2021-3592 has a severity value of 3.8 (low).
Which software is affected by CVE-2021-3592?
The affected software includes libslirp, Redhat Enterprise Linux, Debian Linux, and Fedora.
How can I fix CVE-2021-3592?
You can fix CVE-2021-3592 by applying the recommended updates or patches provided by the software vendors.
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