CVE-2011-0017: Input Validation

Published Feb 2, 2011
·
Updated

The openlog function in log.c in Exim 4.72 and earlier does not check the return value from (1) setuid or (2) setgid system calls, which allows local users to append log data to arbitrary files via a symlink attack.

Affected Software

67 affected components
Exim Exim<=4.72
Exim Exim=2.10
Exim Exim=2.11
Exim Exim=2.12
Exim Exim=3.00
Exim Exim=3.01
Exim Exim=3.02
Exim Exim=3.03
Exim Exim=3.10
Exim Exim=3.11
Exim Exim=3.12
Exim Exim=3.13
Exim Exim=3.14
Exim Exim=3.15
Exim Exim=3.16
Exim Exim=3.20
Exim Exim=3.21
Exim Exim=3.22
Exim Exim=3.30
Exim Exim=3.31
Exim Exim=3.32
Exim Exim=3.33
Exim Exim=3.34
Exim Exim=3.35
Exim Exim=3.36
Exim Exim=4.00
Exim Exim=4.01
Exim Exim=4.02
Exim Exim=4.03
Exim Exim=4.04
Exim Exim=4.05
Exim Exim=4.10
Exim Exim=4.11
Exim Exim=4.12
Exim Exim=4.14
Exim Exim=4.20
Exim Exim=4.21
Exim Exim=4.22
Exim Exim=4.23
Exim Exim=4.24
Exim Exim=4.30
Exim Exim=4.31
Exim Exim=4.32
Exim Exim=4.33
Exim Exim=4.34
Exim Exim=4.40
Exim Exim=4.41
Exim Exim=4.42
Exim Exim=4.43
Exim Exim=4.44
Exim Exim=4.50
Exim Exim=4.51
Exim Exim=4.52
Exim Exim=4.53
Exim Exim=4.54
Exim Exim=4.60
Exim Exim=4.61
Exim Exim=4.62
Exim Exim=4.63
Exim Exim=4.64
Exim Exim=4.65
Exim Exim=4.66
Exim Exim=4.67
Exim Exim=4.68
Exim Exim=4.69
Exim Exim=4.70
Exim Exim=4.71

Event History

Feb 2, 2011
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description

Frequently Asked Questions

1

What is the severity of CVE-2011-0017?

CVE-2011-0017 is considered a medium severity vulnerability due to its potential impact on system integrity.

2

How do I fix CVE-2011-0017?

To fix CVE-2011-0017, upgrade to Exim version 4.73 or later, where the issue is addressed.

3

Who is affected by CVE-2011-0017?

CVE-2011-0017 affects all versions of Exim prior to 4.73, allowing local users to exploit symlink vulnerabilities.

4

What is the nature of the vulnerability in CVE-2011-0017?

CVE-2011-0017 allows local users to append log data to arbitrary files via a symlink attack due to insufficient return value checks.

5

Is CVE-2011-0017 a remote or local vulnerability?

CVE-2011-0017 is a local vulnerability, exploitable by authenticated local users.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203