Vulnerability Description
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. This flaw affects libslirp versions prior to 4.6.0.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libslirp Project | Libslirp | < 4.6.0 |
| Redhat | Enterprise Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1970484Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00004.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202107-44Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210805-0004/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1970484Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00004.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202107-44Third Party Advisory
FAQ
What is CVE-2021-3592?
CVE-2021-3592 is a vulnerability with a CVSS score of 3.8 (LOW). 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 sm...
How severe is CVE-2021-3592?
CVE-2021-3592 has been rated LOW with a CVSS base score of 3.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3592?
Check the references section above for vendor advisories and patch information. Affected products include: Libslirp Project Libslirp, Redhat Enterprise Linux, Debian Debian Linux, Fedoraproject Fedora.