transports/appendfile.c in Exim before 4.72, when MBX locking is enabled, allows local users to change permissions of arbitrary files or create arbitrary files, and cause a denial of service or possibly gain privileges, via a symlink attack on a lockfile in /tmp/.

Two local vulnerabilities have been fixed in the exim MTA which allowed attackers to create arbitrary files or to change ownership of arbitrary files. CVE-2010-2023 and CVE-2010-2024 have been assigned to these issues.

The remote host is affected by the vulnerability described in GLSA-201401-32 (Exim: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Exim. Please review the       CVE identifiers referenced below for details.
  Impact :

    A remote attacker could possibly execute arbitrary code with root       privileges, or cause a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

This update fixes the following security flaws :

  - CVE-2010-2023 exim: hard-link following vulnerability in     mailbox handling

    - CVE-2010-2024 exim: race condition when MBX locking is       enabled

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

It was discovered that Exim contained a design flaw in the way it processed alternate configuration files. An attacker that obtained privileges of the 'Debian-exim' user could use an alternate configuration file to obtain root privileges. (CVE-2010-4345)

It was discovered that Exim incorrectly handled certain return values when handling logging. An attacker that obtained privileges of the 'Debian-exim' user could use this flaw to obtain root privileges.
(CVE-2011-0017)

Dan Rosenberg discovered that Exim incorrectly handled writable sticky-bit mail directories. If Exim were configured in this manner, a local user could use this flaw to cause a denial of service or possibly gain privileges. This issue only applied to Ubuntu 6.06 LTS, 8.04 LTS, 9.10, and 10.04 LTS. (CVE-2010-2023)

Dan Rosenberg discovered that Exim incorrectly handled MBX locking. If Exim were configured in this manner, a local user could use this flaw to cause a denial of service or possibly gain privileges. This issue only applied to Ubuntu 6.06 LTS, 8.04 LTS, 9.10, and 10.04 LTS.
(CVE-2010-2024).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update fixes the following security flaws: * CVE-2010-2023 exim:
hard-link following vulnerability in mailbox handling * CVE-2010-2024 exim: race condition when MBX locking is enabled

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote host is running Exim, a message transfer agent (SMTP).

According to the version number in its banner, the installed version of Exim is earlier than 4.72 and thus potentially affected by one or both of the following vulnerabilities :

  - An error when handling hardlinks within the mail     directory during the mail delivery process can be     exploited to perform unauthorized actions.
    (CVE-2010-2023)

  - When MBX locking is enabled, a race condition exists     that could allow an attacker to change permissions of     other non-root users' files, leading to denial-of-     service conditions or potentially privilege escalation.
    (CVE-2010-2024)

The remote host is running Exim, a message transfer agent. 

Versions of Exim earlier than 4.72 are potentially affected by multiple vulnerabilities :

  - An error when handling hardlinks within the mail directory during the email delivery process can be exploited to perform unauthorized actions. (CVE-2010-2023)

  - When MBX locking is enabled, a race condition exists which could allow an attacker to change permissions of other non-rot users' files, leading to denial-of-service conditions or potentially privilege escalation. (CVE-2010-2024)

ID	Name	Product	Family	Severity
75480	openSUSE Security Update : exim (openSUSE-SU-2010:0416-1)	Nessus	SuSE Local Security Checks	medium
72159	GLSA-201401-32 : Exim: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
53394	Fedora 14 : exim-4.72-2.fc14 (2010-12375)	Nessus	Fedora Local Security Checks	medium
51954	Ubuntu 6.06 LTS / 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : exim4 vulnerabilities (USN-1060-1)	Nessus	Ubuntu Local Security Checks	medium
47817	openSUSE Security Update : exim (openSUSE-SU-2010:0416-1)	Nessus	SuSE Local Security Checks	medium
47816	openSUSE Security Update : exim (openSUSE-SU-2010:0416-1)	Nessus	SuSE Local Security Checks	medium
47540	Fedora 13 : exim-4.72-1.fc13 (2010-9524)	Nessus	Fedora Local Security Checks	medium
47538	Fedora 12 : exim-4.72-1.fc12 (2010-9506)	Nessus	Fedora Local Security Checks	medium
46783	Exim < 4.72 Multiple Vulnerabilities	Nessus	SMTP problems	medium
5557	Exim < 4.72 Multiple Vulnerabilities	Nessus Network Monitor	SMTP Servers	medium

Detections

Analytics

CVE-2010-2024

high

Tenable Plugins

medium

high

medium

medium

medium

medium

medium

medium

medium

medium