CVE-2019-6111

Vulnerability Description

An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.htmlBroken Link
• http://www.openwall.com/lists/oss-security/2019/04/18/1Mailing ListThird Party Advisory
• http://www.openwall.com/lists/oss-security/2022/08/02/1Mailing ListThird Party Advisory
• http://www.securityfocus.com/bid/106741Broken LinkThird Party AdvisoryVDB Entry
• https://access.redhat.com/errata/RHSA-2019:3702Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1677794ExploitIssue TrackingThird Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfThird Party Advisory
• https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.cRelease Notes
• https://lists.apache.org/thread.html/c45d9bc90700354b58fb7455962873c44229841880d
• https://lists.apache.org/thread.html/c7301cab36a86825359e1b725fc40304d1df56dc6d1
• https://lists.apache.org/thread.html/d540139359de999b0f1c87d05b715be4d7d4bec771e
• https://lists.apache.org/thread.html/e47597433b351d6e01a5d68d610b4ba195743def973
• https://lists.debian.org/debian-lts-announce/2019/03/msg00030.htmlMailing ListThird Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
• https://security.gentoo.org/glsa/201903-16Third Party Advisory