CVE-2018-20685
Published: 10 January 2019
In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side.
Priority
Medium
CVSS 3 base score: 5.3
Status
| Package | Release | Status |
|---|---|---|
|
openssh Launchpad, Ubuntu, Debian |
Upstream |
Released
(1:7.9p1-5)
|
| Ubuntu 21.10 (Impish Indri) |
Released
(1:7.9p1-5)
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Released
(1:7.9p1-5)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(1:7.9p1-5)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(1:7.6p1-4ubuntu0.2)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(1:7.2p2-4ubuntu2.7)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(1:6.6p1-2ubuntu2.12)
|
|
|
Patches: Upstream: https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2 Upstream: https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&r2=1.198&f=h |
||
|
openssh-ssh1 Launchpad, Ubuntu, Debian |
Upstream |
Ignored
(frozen on openssh 7.5p)
|
| Ubuntu 21.10 (Impish Indri) |
Needs triage
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Needs triage
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Needs triage
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Needs triage
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
Notes
| Author | Note |
|---|---|
| seth-arnold | openssh-ssh1 is provided for compatibility with old devices that cannot be upgraded to modern protocols. Thus we may not provide security support for this package if doing so would prevent access to equipment. |
| mdeslaur | The recommended workaround for this issue is to switch to using sftp instead of scp. |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20685
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
- https://lists.mindrot.org/pipermail/openssh-unix-dev/2019-January/037459.html
- https://ubuntu.com/security/notices/USN-3885-1
- NVD
- Launchpad
- Debian