Security restrictions bypass in lftp - CVE-2018-10916

Vulnerability identifier: #VU14187

CSH Severity: Medium

CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-10916

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to improper sanitization of remote file names. A remote unauthenticated attacker can trick the victim into using reverse mirroring on an attacker controlled FTP server bypass security restrictions and remove all files in the current working directory of the victim's system.

lftp
Amazon Linux AMI
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Slackware Linux
Ubuntu
Opensuse
IBM Tivoli Storage Manager
lftp (Alpine package)
lftp (Ubuntu package)
lftp (Red Hat package)

Update to version 4.8.4.

lftp - update to 4.8.4
lftp (Alpine package) - update to 4.8.4-r0
lftp (Ubuntu package) - addressed in versions 4.4.13-1ubuntu0.1, 4.6.3a-1ubuntu0.1, 4.8.1-1ubuntu0.1
lftp (Red Hat package) - update to 4.4.8-12.el7

• https://github.com/lavv17/lftp/commit/a27e07d90a4608ceaf928b1babb27d4d803e1992

• Security restrictions bypass in lftp
• Slackware Linux update for lftp
• OpenSUSE Linux update for lftp
• OpenSUSE Linux update for lftp
• Red Hat Enterprise Linux 7 update for lftp
• Amazon Linux AMI update for lftp
• Security restrictions bypass in lftp (Alpine package)
• Ubuntu update for lftp