In OpenSSH 7.9, scp.c in the scp client allows remote...

Vulnerability Description

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.

References

• https://www.debian.org/security/2019/dsa-4387
• https://usn.ubuntu.com/3885-1/
• https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2
• https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&r2=1.198&f=h
• https://security.netapp.com/advisory/ntap-20190215-0001/
• http://www.securityfocus.com/bid/106531
• https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
• https://security.gentoo.org/glsa/201903-16
• https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
• https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
• https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
• https://access.redhat.com/errata/RHSA-2019:3702
• https://security.gentoo.org/glsa/202007-53
• https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf