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Vulnerability record · CVE-2005-2991 · published 20 September 2005

CVE-2005-2991: Ncompress vulnerability

NNcompress · Ncompress

ncompress 4.2.4 and earlier allows local users to overwrite arbitrary files via a symlink attack on temporary files using (1) zdiff or (2) zcmp, a different vulnerability than CVE-2004-0970.

2.1 CVSS 2.0 Low EPSS 0.37% · top 72.0%
2.1CVSS 2.0 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

ncompress 4.2.4 and earlier allows local users to overwrite arbitrary files via a symlink attack on temporary files using (1) zdiff or (2) zcmp, a different vulnerability than CVE-2004-0970.

AV:L/AC:L/Au:N/C:N/I:P/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=112689772732098&w=2
http://marc.info/?l=full-disclosure&m=112688098630314&w=2
http://securityreason.com/securityalert/12
http://www.zataz.net/adviso/ncompress-09052005.txt Vendor Advisory
http://marc.info/?l=bugtraq&m=112689772732098&w=2
http://marc.info/?l=full-disclosure&m=112688098630314&w=2
http://securityreason.com/securityalert/12
http://www.zataz.net/adviso/ncompress-09052005.txt Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2006-1168Ncompress vulnerabilityThe decompress function in compress42.c in (1) ncompress 4.2.4 and (2) liblzw allows remote attackers to cause a denial of service (crash), and possi…EPSS 5.8%7.5CVE-2001-1413Ncompress vulnerabilityStack-based buffer overflow in the comprexx function for ncompress 4.2.4 and earlier, when used in situations that cross security boundaries (such as…EPSS 4.8%

Source: NIST National Vulnerability Database (record CVE-2005-2991), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.