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Fencer Vulns
medium 4.4

CVE-2009-0036 json

Buffer overflow in the proxyReadClientSocket function in proxy/libvirt_proxy.c in libvirt_proxy 0.5.1 might allow local users to gain privi…

published 2009-02-11 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-0047

cvss
4.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
1
Exploit-DB

Summary

Buffer overflow in the proxyReadClientSocket function in proxy/libvirt_proxy.c in libvirt_proxy 0.5.1 might allow local users to gain privileges by sending a portion of the header of a virProxyPacket packet, and then sending the remainder of the packet with crafted values in the header, related to use of uninitialized memory in a validation check.

Patch / fix

  • libvirt Debian 14, Debian 13, Debian 12 0.5.1-7

debian advisories DEBIAN-CVE-2009-0036

  • libvirt RHEL 5 VIRTUALIZATION 0.3.3-14.el5_3.1
  • libvirt-python RHEL 5 VIRTUALIZATION 0.3.3-14.el5_3.1

red hat advisories RHSA-2009:0382

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-0036 updated cvss 6.2

libvirt: libvirt_proxy buffer overflow

  • Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) libvirt 0.3.3-14.el5_3.1, libvirt-python 0.3.3-14.el5_3.1 Red Hat Enterprise Linux Virtualization (v. 5 server) libvirt 0.3.3-14.el5_3.1, libvirt-python 0.3.3-14.el5_3.1
    fixed: vendor fix RHSA-2009:0382

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. Published
  2. First public exploit (EDB-8534)

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-8534 libvirt_proxy 0.5.1 - Local Privilege Escalation local, 2009-04-27
  • redhat.com https://www.redhat.com/archives/libvir-list/2009-January/msg00728.html referenced PoC, tagged "exploit" by a source, unverified
  • redhat.com https://www.redhat.com/archives/libvir-list/2009-January/msg00726.html referenced PoC, tagged "exploit" by a source, unverified
  • redhat.com https://www.redhat.com/archives/libvir-list/2009-January/msg00699.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.4 AV:L/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.