Packages
- openssh - secure shell (SSH) for secure access to remote machines
Details
USN-8514-1 fixed a vulnerability in OpenSSH. This update provides
the corresponding fix for Ubuntu 14.04 LTS, Ubuntu 18.04 LTS, and
Ubuntu 20.04 LTS.
Original advisory details:
It was discovered that OpenSSH incorrectly handled file permissions when
downloading files as root using the legacy scp protocol without the
preserve-mode option. An attacker could use this to install setuid or setgid
files on a system, possibly leading to privilege escalation.
USN-8514-1 fixed a vulnerability in OpenSSH. This update provides
the corresponding fix for Ubuntu 14.04 LTS, Ubuntu 18.04 LTS, and
Ubuntu 20.04 LTS.
Original advisory details:
It was discovered that OpenSSH incorrectly handled file permissions when
downloading files as root using the legacy scp protocol without the
preserve-mode option. An attacker could use this to install setuid or setgid
files on a system, possibly leading to privilege escalation.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 20.04 LTS focal | openssh-client – 1:8.2p1-4ubuntu0.13+esm2 | ||
| openssh-server – 1:8.2p1-4ubuntu0.13+esm2 | |||
| 18.04 LTS bionic | openssh-client – 1:7.6p1-4ubuntu0.7+esm5 | ||
| openssh-server – 1:7.6p1-4ubuntu0.7+esm5 | |||
| 14.04 LTS trusty | openssh-client – 1:6.6p1-2ubuntu2.13+esm3 | ||
| openssh-server – 1:6.6p1-2ubuntu2.13+esm3 | |||
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