Medium severity · published Mar 21, 2024
CVE-2024-2494
Libvirt: negative g_new0 length can lead to unbounded memory allocation
6.2
CVSS
0.4%
EPSS
No
On KEV
Description
A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 6 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 Advanced Virtualization · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-2494
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-2494
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:2560
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:3253
access.redhat.com
https://access.redhat.com/security/cve/CVE-2024-2494
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2270115
lists.libvirt.org
https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/
lists.debian.org
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
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