| Name | CVE-2020-14331 |
| Description | A flaw was found in the Linux kernel’s implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console, calling an ioctl VT_RESIZE, which causes an out-of-bounds write to occur. This flaw allows a local user with access to the VGA console to crash the system, potentially escalating their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2385-1, DLA-2420-1, ELA-307-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | vulnerable |
| stretch (security) | 4.9.320-2 | fixed | |
| stretch (lts), stretch | 4.9.320-3 | fixed | |
| buster (security), buster, buster (lts) | 4.19.316-1 | fixed | |
| bullseye | 5.10.223-1 | fixed | |
| bullseye (security) | 5.10.226-1 | fixed | |
| bookworm | 6.1.115-1 | fixed | |
| bookworm (security) | 6.1.119-1 | fixed | |
| trixie | 6.12.5-1 | fixed | |
| sid | 6.12.6-1 | fixed | |
| linux-4.19 (PTS) | stretch (security) | 4.19.232-1~deb9u1 | fixed |
| stretch (lts), stretch | 4.19.316-1~deb9u1 | fixed | |
| linux-4.9 (PTS) | jessie, jessie (lts) | 4.9.303-1~deb8u3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | stretch | 4.9.240-1 | DLA-2420-1 | ||
| linux | source | buster | 4.19.146-1 | |||
| linux | source | (unstable) | 5.7.17-1 | unimportant | ||
| linux-4.19 | source | stretch | 4.19.146-1~deb9u1 | DLA-2385-1 | ||
| linux-4.9 | source | jessie | 4.9.240-2~deb8u1 | ELA-307-1 |
https://www.openwall.com/lists/oss-security/2020/07/28/2
Only exploitable when CONFIG_VGACON_SOFT_SCROLLBACK is set