Fetchmail multi-drop mode multiple buffer overflows
| fetchmail-multidrop-bo (10203) |  High Risk |
Description:
Fetchmail is vulnerable to multiple buffer overflows that could occur when Fetchmail is configured to run in the multi-drop mode. By sending a malicious email with malformed mail header data, a remote attacker can overflow a buffer and execute arbitrary code on the system with privileges of the Fetchmail daemon, possibly root, or cause the Fetchmail daemon to crash.
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of Fetchmail (6.1.0 or later), available from the Fetchmail Web page. See References.
For Gentoo Linux containing the fetchmail packages:
Upgrade versions net-mail/fetchmai-0.59.14 and earlier, as listed in Gentoo Linux Security Announcement 2002-10-01 09:30 UTC . See References.
For EnGarde Secure Linux: Community Edition:
Upgrade to the latest version of fetchmail-ssl (6.1.0-1.0.5 or later), as listed in EnGarde Secure Linux Security Advisory ESA-20021003-023. See References.
For Debian GNU/Linux:
Upgrade to the latest fetchmail package, as listed below. Refer to DSA-171-1 for more information. See References.
Debian GNU/Linux 2.2 (potato): 5.3.3-4.2 or later Debian GNU/Linux 3.0 (woody): 5.9.11-6.1 or later
For Red Hat Linux:
Upgrade to the latest fetchmail package, as listed below. Refer to RHSA-2002:215-09 for more information. See References.
Red Hat Linux 6.2: 5.9.0-18 or later
Red Hat Linux 7.0: 5.9.0-19 or later
Red Hat Linux 7.2 and 7.3: 5.9.0-20 or later
Red Hat Linux 8.0: 5.9.0-21 or later
For Conectiva Linux:
Upgrade to the latest fetchmail package, as listed below. Refer to Conectiva Linux Announcement CLSA-2002:531. See References.
Conectiva Linux 6.0: 5.9.12-1U60_3cl or later
Conectiva Linux 7.0: 5.9.12-1U70_3cl or later
Conectiva Linux 8.0: 5.9.12-1U80_2cl or later
Apply the appropriate patch for your system, as listed in Sun Alert ID: 47784. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- Conectiva Linux Announcement CLSA-2002:531: Multidrop mode vulnerabilities.
- e-matters Security Advisory 03/2002: Fetchmail remote vulnerabilities.
- EnGarde Secure Linux Security Advisory ESA-20021003-023: buffer overflows and broken boundary checks.
- Fetchmail Web Page: The fetchmail Home Page.
- Gentoo Linux Security Announcement 2002-10-01 09:30 UTC: fetchmail.
- Sun Alert ID: 47784: Sun Linux/Sun Cobalt Security Vulnerability in "fetchmail".
- BID-5825: Eric S. Raymond Fetchmail Email Header Parsing Buffer Overflow Vulnerability
- BID-5826: Eric S. Raymond Fetchmail Multidrop Mode Denial Of Service Vulnerability
- BID-5827: Eric S. Raymond Fetchmail Multidrop Mode Email Header Parsing Heap Overflow Vulnerability
- CVE-2002-1174: Buffer overflows in Fetchmail 6.0.0 and earlier allow remote attackers to cause a denial of service (crash) or execute arbitrary code via (1) long headers that are not properly processed by the readheaders function, or (2) via long Received: headers, which are not properly parsed by the parse_received function.
- CVE-2002-1175: The getmxrecord function in Fetchmail 6.0.0 and earlier does not properly check the boundary of a particular malformed DNS packet from a malicious DNS server, which allows remote attackers to cause a denial of service (crash) when Fetchmail attempts to read data beyond the expected boundary.
- DSA-171: fetchmail -- buffer overflows
- MDKSA-2002:063: Updated fetchmail packages fix various vulnerabilities
- RHSA-2002-215: Updated fetchmail packages fix vulnerabilities
- RHSA-2002-216: fetchmail security update
- RHSA-2003-155: Updated Fetchmail packages fix security vulnerabilities
Platforms Affected:
- Conectiva Linux 6.0
- Conectiva Linux 7.0
- Conectiva Linux 8.0
- Debian Debian Linux 2.2
- Debian Debian Linux 3.0
- EngardeLinux Secure Linux
- Eric S. Raymond Fetchmail 6.0.0
- Gentoo Linux
- RedHat Enterprise Linux 2.1 AS
- RedHat Linux 6.2
- RedHat Linux 7
- RedHat Linux 7.1
- RedHat Linux 7.1 for iSeries
- RedHat Linux 7.1 for pSeries
- RedHat Linux 7.2
- RedHat Linux 7.3
- RedHat Linux 8.0
- Sun Solaris 5.0
Reported:
Sep 23, 2002
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