NA

CVE-2019-0053

Published: 11/07/2019 Updated: 11/07/2019

Vulnerability Summary

Insufficient validation of environment variables in the telnet client supplied in Junos OS can lead to stack-based buffer overflows, which can be exploited to bypass veriexec restrictions on Junos OS. A stack-based overflow is present in the handling of environment variables when connecting via the telnet client to remote telnet servers. This issue only affects the telnet client ? accessible from the CLI or shell ? in Junos OS. Inbound telnet services are not affected by this issue. This issue affects: Juniper Networks Junos OS: 12.3 versions before 12.3R12-S13; 12.3X48 versions before 12.3X48-D80; 14.1X53 versions before 14.1X53-D130, 14.1X53-D49; 15.1 versions before 15.1F6-S12, 15.1R7-S4; 15.1X49 versions before 15.1X49-D170; 15.1X53 versions before 15.1X53-D237, 15.1X53-D496, 15.1X53-D591, 15.1X53-D69; 16.1 versions before 16.1R3-S11, 16.1R7-S4; 16.2 versions before 16.2R2-S9; 17.1 versions before 17.1R3; 17.2 versions before 17.2R1-S8, 17.2R2-S7, 17.2R3-S1; 17.3 versions before 17.3R3-S4; 17.4 versions before 17.4R1-S6, 17.4R2-S3, 17.4R3; 18.1 versions before 18.1R2-S4, 18.1R3-S3; 18.2 versions before 18.2R1-S5, 18.2R2-S2, 18.2R3; 18.2X75 versions before 18.2X75-D40; 18.3 versions before 18.3R1-S3, 18.3R2; 18.4 versions before 18.4R1-S2, 18.4R2.

Vulnerability Trend

Vendor Advisories

inetutils <= 197 contains a stack overflow vulnerability in the client-side environment variable handling which can be exploited to escape restricted shells on embedded devices A stack-based overflow is present in the handling of environment variables when connecting telnetc to remote telnet servers through oversized DISPLAY arguments ...