What’s Vulnerable › Vulnerabilities

CVE-2011-0017

• Severity: medium (CVSS 6.9 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-02-02 · updated 2026-06-16
• Weakness: CWE-20

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.

Affected products

• Exim: through 4.72; 2.10, 2.11, 2.12, 3.00, 3.01, 3.02 (+60)

References

• http://lists.exim.org/lurker/message/20110126.034702.4d69c278.en.html
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00004.html
• http://osvdb.org/70696
• http://secunia.com/advisories/43101
• http://secunia.com/advisories/43128
• http://secunia.com/advisories/43243
• http://www.debian.org/security/2011/dsa-2154
• http://www.securityfocus.com/bid/46065
• http://www.ubuntu.com/usn/USN-1060-1
• http://www.vupen.com/english/advisories/2011/0224
• http://www.vupen.com/english/advisories/2011/0245

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