|Description||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. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)|
Vulnerable and fixed packages
The table below lists information on source packages.
|libslirp (PTS)||bullseye, sid||4.4.0-1||vulnerable|
|buster, buster (security)||1:3.1+dfsg-8+deb10u8||vulnerable|
The information below is based on the following data on fixed versions.
|Package||Type||Release||Fixed Version||Urgency||Origin||Debian Bugs|
[bullseye] - libslirp <no-dsa> (Minor issue)
[buster] - qemu <no-dsa> (Minor issue)
[stretch] - qemu <no-dsa> (Minor issue)
qemu 1:4.1-2 switched to system libslirp, marking that version as fixed.