QID 355691

Date Published: 2023-07-27

QID 355691: Amazon Linux Security Advisory for qemu : ALAS2-2023-2169

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. (
( CVE-2021-3592) an invalid pointer initialization issue was found in the slirp networking implementation of qemu.
The flaw exists in the udp6_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.
( CVE-2021-3593) 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.
( CVE-2021-3594) an invalid pointer initialization issue was found in the slirp networking implementation of qemu.
The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the tftp_t structure.
( CVE-2021-3595)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as Medium - 3.8 severity.
  • CVSS V2 rated as Low - 2.1 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2-2023-2169 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 355691

    CVE-2021-3592 | CVE-2021-3594 | CVE-2021-3595 | CVE-2021-3593 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2-2023-2169 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALAS-2023-2169.html
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