Vulnerability Description
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp_input() function and could occur while processing a udp packet that is smaller than the size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. 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=1970491Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlMailing ListThird 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=1970491Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlMailing ListThird 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
FAQ
What is CVE-2021-3594?
CVE-2021-3594 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 udp_input() function and could occur while processing a udp packet that is smal...
How severe is CVE-2021-3594?
CVE-2021-3594 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-2021-3594?
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.