ncompress decompress() buffer underflow

ncompress-decompress-underflow (28315) The risk level is classified as HighHigh Risk

Description:

ncompress is vulnerable to a buffer underflow, caused by improper bounds checking by the decompress() function in compress42.c. By sending a specially-crafted datastream, a remote attacker could cause a buffer underflow and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score: 7
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.2
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

For Debian GNU/Linux:
Refer to DSA-1149-1 for patch, upgrade or suggested workaround information. See References.

For Mandriva:
Refer to Mandriva Security Advisory MDKSA-2006:140 for patch, upgrade or suggested workaround information. See References.

For Red Hat Linux:
Refer to RHSA-2006:0663-13 for patch, upgrade, or suggested workaround information. See References.

For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 200610-03 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • ncompress Web site: ncompress 4.2.4-31 RPM for i386.
  • ASA-2006-226: ncompress security update (RHSA-2006-0663)
  • BID-19455: NCompress Decompress Buffer Underflow Vulnerability
  • CVE-2006-1168: The 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 possibly execute arbitrary code, via crafted data that leads to a buffer underflow.
  • DSA-1149: ncompress -- buffer underflow
  • GLSA-200610-03: ncompress: Buffer Underflow
  • MDKSA-2006:140: Updated ncompress packages fix vulnerability
  • RHSA-2006-0663: ncompress security update
  • RHSA-2012-0308: Low: busybox security and bug fix update
  • RHSA-2012-0810: Low: busybox security and bug fix update
  • SA21427: ncompress "decompress()" Buffer Overflow Vulnerability
  • SA22377: Avaya Products ncompress Buffer Overflow Vulnerability
  • SECTRACK ID: 1016836: ncompress Buffer Overflow in decompress() Lets Remote Users Execute Arbitrary Code
  • SUSE-SR:2006:020: SUSE Security Summary Report
  • VUPEN/ADV-2006-3234: ncompress decompress() Datastream Handling Client-Side Buffer Overflow Vulnerability

Platforms Affected:

  • Debian Debian Linux 3.1
  • Gentoo Linux
  • MandrakeSoft Mandrake Linux 2006
  • MandrakeSoft Mandrake Linux 2006 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Enterprise Linux 2.1 WS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 6 Workstation
  • RedHat Enterprise Linux 6 Server
  • RedHat Enterprise Linux WS
  • RedHat Enterprise Linux ES
  • RedHat Enterprise Linux AS
  • RedHat Enterprise Linux Desktop 6
  • RedHat Enterprise Linux HPC Node 6
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • Various vendors ncompress 4.x

Reported:

Aug 10, 2006

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