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VULNERABILITIES

CVE-2021-3594 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:3.8 LOWVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=1970491 CVEIssue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html CVEMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html CVE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH/ CVE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI/ CVE

see all 14 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-824Access of Uninitialized Pointer[email protected]

Affected Products

ProductVersions
libslirp project libslirp
< 4.6.0

CPE

  • cpe:2.3:a:libslirp_project:libslirp:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
redhat enterprise linux
8.0

CPE

  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*

Remediation

  • No remediation found in references.
debian debian linux
9.0

CPE

  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
fedoraproject fedora
33
34

CPE

  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

11 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-3594
NVD Published Date:
Jun 15, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-3594 Details - Not Deferred