Bug 847988 (CVE-2012-3482) - CVE-2012-3482 fetchmail: DoS (crash) in the base64 decoder upon server NTLM protocol exchange abort right after the initial request
Summary: CVE-2012-3482 fetchmail: DoS (crash) in the base64 decoder upon server NTLM p...
Alias: CVE-2012-3482
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 847989
Blocks: 847991
TreeView+ depends on / blocked
Reported: 2012-08-14 09:33 UTC by Jan Lieskovsky
Modified: 2019-09-29 12:54 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2019-06-10 10:59:03 UTC

Attachments (Terms of Use)

Description Jan Lieskovsky 2012-08-14 09:33:48 UTC
A denial of service flaw was found in the way Fetchmail, a remote mail retrieval and forwarding utility, performed base64 decoding of certain NTLM server responses. Upon sending the NTLM authentication request, Fetchmail did not check if the received response was actually part of NTLM protocol exchange, or server-side error message and session abort. A rogue NTML server could use this flaw to cause fetchmail executable crash.

Upstream patches:
[1] http://gitorious.org/fetchmail/fetchmail/commit/3fbc7cd331602c76f882d1b507cd05c1d824ba8b
[1a] https://gitorious.org/fetchmail/fetchmail/commit/c189f6a54f36f5b6f7734303db3cfc52311aab5f
[1b] https://gitorious.org/fetchmail/fetchmail/commit/b3e0cd2d558b5ccf06c816eed38c883d7462d3d4

Upstream advisory (not available yet):
[2] http://www.fetchmail.info/fetchmail-SA-2012-02.txt

CVE request:
[3] http://www.openwall.com/lists/oss-security/2012/08/13/9

[4] https://bugs.gentoo.org/show_bug.cgi?id=431284

Comment 1 Jan Lieskovsky 2012-08-14 09:34:54 UTC
This issue affects the versions of the fetchmail package, as shipped with Fedora release of 16 and 17. Please schedule an update.

Comment 2 Jan Lieskovsky 2012-08-14 09:35:45 UTC
Created fetchmail tracking bugs for this issue

Affects: fedora-all [bug 847989]

Comment 4 Fedora Update System 2012-10-02 15:57:13 UTC
fetchmail-6.3.22-1.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

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