PT-2010-3642 · Exim · Exim

Dan Rosenberg · Published 2010-06-07 · Updated 2024-06-15 · CVE-2010-2023

Positive Technologies (AI Summary)

CVSS v2.0

4.4

Medium

Base vector

AV:L/AC:M/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.72

Description The issue arises when a world-writable mail directory with the sticky-bit activated is used. In this scenario, the software fails to verify the st nlink field of mailbox files. This oversight allows local users to potentially cause a denial of service or gain privileges by creating a hard link to another user's file.

Recommendations For versions prior to 4.72, update to version 4.72 or later to resolve the issue. As a temporary workaround, consider restricting write access to the mail directory to prevent local users from creating hard links to other users' files.

Fix

DoS

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2010-2023

OPENSUSE-SU-2024:10017-1

Affected Products

Exim

References · 34

• https://osv.dev/vulnerability/DEBIAN-CVE-2010-2023 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042613.html · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10017-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2010-2023 · Vendor Advisory
• http://ubuntu.com/usn/USN-1060-1 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042587.html · Vendor Advisory
• http://vcs.exim.org/viewvc/exim/exim-src/src/transports/appendfile.c?r1=1.24&r2=1.25 · Patch
• http://secunia.com/advisories/40019 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2010-2023 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2010-2023 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html · Vendor Advisory
• https://suse.com/security/cve/CVE-2011-0017 · Note
• http://securityfocus.com/bid/40451 · Note
• http://secunia.com/advisories/40123 · Note
• http://lists.exim.org/lurker/message/20100524.175925.9a69f755.en.html · Note