CVE-2011-0017

CVE-2011-0017 is a medium-severity vulnerability in Exim with a CVSS 2.0 base score of 6.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Description

The open_log 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.

Frequently asked questions

What is CVE-2011-0017?
The open_log 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.
How severe is CVE-2011-0017?
CVE-2011-0017 has a CVSS 2.0 base score of 6.9, rated medium severity.
Is CVE-2011-0017 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0017?
CVE-2011-0017 primarily affects Exim. In total, 67 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0017?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-0017 published?
CVE-2011-0017 was published on 2011-02-02 and last updated on 2026-06-16.

References

Affected products (67)

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