6491 : GNU ed tmpfile Symlink Arbitrary File Overwrite
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
3	249	over 6 years ago	over 2 years ago	0 times	90%

Timeline

Disclosure Date	Exploit Publish Date
2000-12-11	2000-12-11

Description

GNU ed contains a flaw that may allow a malicious user to overwrite arbitrary files. The issue is triggered when a user creates a symlink to a temporary file and the system is halted before the file is saved. This flaw may lead to a loss of integrity and availability.

Classification

Location: Local Access Required
Attack Type: Race Condition
Impact: Loss of Integrity, Loss of Availability
Exploit: Exploit Public

Solution

Upgrade to version 0.2-19 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

GNU

ed

0.2-18.1

References

Secunia Advisory ID: 12780
CVE ID: 2000-1137 (see also: NVD)
Bugtraq ID: 2095
ISS X-Force ID: 5723
Mail List Post: http://archives.neohapsis.com/archives/apps/freshmeat/2006-11/0013.html
http://archives.neohapsis.com/archives/bugtraq/2000-12/0132.html
Vendor Specific Advisory URL: http://distro.conectiva.com/atualizacoes/?id=a&anuncio=000359
http://www.debian.org/security/2000/20001129
http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2000:076
Other Advisory URL: http://security.gentoo.org/glsa/glsa-200410-07.xml
Vendor URL: http://www.gnu.org/software/ed/ed.html
RedHat RHSA: RHSA-2000:123-01

Tools & Filters

	15445

Credit

Christer Öberg - Wkit Security AB
Patrik Birgersson - Wkit Security AB

CVSSv2 Score

CVSSv2 Base Score = 4.6
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

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