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CVE-2010-2023

Status Candidate

Overview

transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user's file.

Related Files

Gentoo Linux Security Advisory 201401-32
Posted Jan 27, 2014
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201401-32 - Multiple vulnerabilities were found in Exim, the worst of which leading to remote execution of arbitrary code with root privileges. Versions less than 4.80.1 are affected.

tags | advisory, remote, arbitrary, root, vulnerability
systems | linux, gentoo
advisories | CVE-2010-2023, CVE-2010-2024, CVE-2010-4344, CVE-2010-4345, CVE-2011-0017, CVE-2011-1407, CVE-2011-1764, CVE-2012-5671
SHA-256 | e3a4e4748cd68f2fd685d0f69f6b2dbf2c95867f71a5d365a61fe7544703c801
Ubuntu Security Notice USN-1060-1
Posted Feb 10, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1060-1 - 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. It was discovered that Exim incorrectly handled certain return values when handling logging. A local attacker could use this flaw to obtain root privileges. 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. 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.

tags | advisory, denial of service, local, root
systems | linux, debian, ubuntu
advisories | CVE-2010-2023, CVE-2010-2024, CVE-2010-4345, CVE-2011-0017
SHA-256 | ddedee4f97df5235f57efc58f31271973887b9faebda73310424f883607b7dcc
Exim Exploit In The Wild Advisory
Posted Dec 13, 2010
Authored by Nigel Metheringham

It has come to the attention of The Exim Maintainers that there is an exploit circulating in the wild which affects versions of Exim versions 4.69 and below. The flaw permits remote code execution over SMTP and, when combined with some clever abuse of Exim's configuration, escalation to root privileges from the Exim run-time user.

tags | advisory, remote, overflow, root, code execution
advisories | CVE-2010-4344, CVE-2010-4345, CVE-2010-2023, CVE-2010-2024
SHA-256 | 5adb4da500bcb608c4a6e8d0326b0cf1582c4c29fc9fdc75ec210086b2a2eb60
Exim 4 Symlink / Race Condition Vulnerabilities
Posted Jun 4, 2010
Authored by Dan Rosenberg

Exim 4 suffers from local symlink and race condition vulnerabilites.

tags | advisory, local
advisories | CVE-2010-2023, CVE-2010-2024
SHA-256 | d894d9ac3680893c4de1df8deea0bb09c3c5f18e99348ec10bb3351fafdf3e38
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