-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-2319-1 debian-...@lists.debian.org https://www.debian.org/lts/security/ Abhijith PA August 09, 2020 https://wiki.debian.org/LTS - -------------------------------------------------------------------------
Package : xrdp Version : 0.9.1-9+deb9u4 CVE ID : CVE-2020-4044 Debian Bug : 964573 xrdp-sesman service in xrdp can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. This is a buffer overflow attack, so there may be a risk of arbitrary code execution as well. For Debian 9 stretch, this problem has been fixed in version 0.9.1-9+deb9u4. We recommend that you upgrade your xrdp packages. For the detailed security status of xrdp please refer to its security tracker page at: https://security-tracker.debian.org/tracker/xrdp Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEE7xPqJqaY/zX9fJAuhj1N8u2cKO8FAl8wD/0ACgkQhj1N8u2c KO82Tw/9FdQb+Bjxsdo6Kj0FLFJAzh6NN0cEtM29OP1Z6Fd/foRUdM8/HIa9Kpkt oOXrQoLUThrsOqY5E0vOp5Suot72TeZn8Xm4FNIxGugMCazrZ46+tPfC7/njGdHy 2YHpe/tdBAD56ANvUs9QQ3hJLGhiUXREMUiSgm12tE5BsUvK22ah2fFZA3m8CuQr 3pMnDfLyzWQDk8CYCztzMeNaosFG9/wNOSV1/1+guf1wF8r+P1qaKnPqgZDmxTiA 4KO0w2LvZPYJyboA/JIchFDwpUydAmvkhSdsM0Ha3cB0ggBvNHJzu5aqj6+HquZo G1TghiKuIXF4LdKUQwhLbbIB6P2EEuikkmsEM+9qzZbgAp6S4ansNcgGyI0/gJ34 8DoIiGyDtyDqqjsAO5yb97Wb/YzKVWn8puPSk367u7Loq3phkoZY9mgwfNoXHvmS TCmfMP1MMWPMMd3KIYa/5Z142/Ms+i538Dam3xdQstNyRvs+JT1TnNarNF0fqQif MH9GBGJ5rNTg6iphkOnWsFBZn5oJYm6ExAERhcuVokRzwjMpi55zE3uNYo1h+qUY bQbpSIph1AaYUCRbw7QnXe8ElWtU0pX3D+weFHdOjQhaDnqMI72yfCsbCINOzfm/ 2b5lFlK6ifO6a60IpDFCAHwBoOyJUEX0BTZo5SGKhCX/gZhosTM= =6n5B -----END PGP SIGNATURE-----