Vulnerability in Libslirp Project
CVE-2021-3594
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Libslirp Project
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 33, 34
- Red Hat Enterprise Linux — versions 8.0
- Qemu — versions libslirp 4.6.0
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202107-44 (vendor-advisory, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210805-0004/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/09/msg00000.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/03/msg00013.html (mailing-list)
Frequently asked questions
- What is CVE-2021-3594?
- CVE-2021-3594 is a low-severity vulnerability in Libslirp Project, classified under Access of Uninitialized Pointer. CVSS score: 3.8/10. Published 2021-06-15.
- How severe is CVE-2021-3594?
- Low severity. CVSS v3 base score is 3.8 out of 10.