MGASA-2021-0480

Advisory lineage Upstream: 4 Downstream: 0
Published: 20 Oct 2021, 21:28
Last modified:16 Apr 2026, 04:24

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Oct 2021, 21:28
Published
Vulnerability first disclosed
16 Apr 2026, 04:24
Last Modified
Vulnerability information updated

Description

Updated libslirp packages fix security vulnerability Invalid pointer initialization issues were found in the SLiRP networking implementation of QEMU. In the bootp_input() function 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) In the udp6_input() function 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. (CVE-2021-3593) In the udp_input() function 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. (CVE-2021-3594) In the tftp_input() function while processing a udp packet that is smaller than the size of the 'tftp_t' 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. (CVE-2021-3595)

Affected Systems

  • mageia•libslirp

    < 4.4.0-1.1.mga8

References (3)