4.6
CVSSv2

CVE-2003-0740

Published: 20/10/2003 Updated: 18/10/2016
CVSS v2 Base Score: 4.6 | Impact Score: 6.4 | Exploitability Score: 3.9
VMScore: 465
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Summary

Stunnel 4.00, and 3.24 and previous versions, leaks a privileged file descriptor returned by listen(), which allows local users to hijack the Stunnel server.

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stunnel stunnel 3.10

stunnel stunnel 3.11

stunnel stunnel 3.18

stunnel stunnel 3.19

stunnel stunnel 3.3

stunnel stunnel 3.4a

stunnel stunnel 3.16

stunnel stunnel 3.17

stunnel stunnel 3.21c

stunnel stunnel 3.22

stunnel stunnel 3.24

stunnel stunnel 3.12

stunnel stunnel 3.13

stunnel stunnel 3.20

stunnel stunnel 3.21

stunnel stunnel 3.7

stunnel stunnel 3.8

stunnel stunnel 3.14

stunnel stunnel 3.15

stunnel stunnel 3.21a

stunnel stunnel 3.21b

stunnel stunnel 3.9

stunnel stunnel 4.0

Exploits

/* By Steve Grubb : The technique is simple * * 1) Fork so that stunnel can't find you when it dies * 2) Send stunnel a SIGUSR2 Unhandled signals generally * kill programs Since you are a child of stunnel, the OS * will deliver the signal * 3) Select on the leaked descriptor and start serving pages * * At the end of this advisory is ...