Vulnerability in Libslirp Project
CVE-2021-3592
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the bootp_input() function and could occur while processing a udp packet that is smaller than the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of uninitialized heap memory from the host. 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/2021/09/msg00004.html (mailing-list, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/03/msg00013.html (mailing-list)
Frequently asked questions
- What is CVE-2021-3592?
- CVE-2021-3592 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-2021-3592?
- Low severity. CVSS v3 base score is 3.8 out of 10.