CVE-2015-3245

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2015-3245
Incomplete blacklist vulnerability in the chfn function in libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, allows local users to cause a denial of service (/etc/passwd corruption) via a newline character in the GECOS field.

2.1 /10

CVSS v2.0 : LOW

V2 Legend

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

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html
http://rhn.redhat.com/errata/RHSA-2015-1482.html
http://rhn.redhat.com/errata/RHSA-2015-1483.html
http://www.securityfocus.com/bid/76021
http://www.securitytracker.com/id/1033040
https://access.redhat.com/articles/1537873
https://www.exploit-db.com/exploits/44633/
https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt Exploit
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:redhat:libuser:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:libuser:0.60-1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:libuser:0.60-2:*:*:*:*:*:*:*
cpe:2.3:a:redhat:libuser:0.60-3:*:*:*:*:*:*:*
cpe:2.3:a:redhat:libuser:0.60-4:*:*:*:*:*:*:*
cpe:2.3:a:redhat:libuser:0.60-5:*:*:*:*:*:*:*
cpe:2.3:a:redhat:libuser:0.60-6:*:*:*:*:*:*:*
History

13 Feb 2023, 00:48

Type Values Removed Values Added
Summary It was found that libuser, as used by the chfn userhelper functionality, did not properly filter out newline characters in GECOS fields. A local, authenticated user could use this flaw to corrupt the /etc/passwd file, resulting in a denial-of-service on the system. Incomplete blacklist vulnerability in the chfn function in libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, allows local users to cause a denial of service (/etc/passwd corruption) via a newline character in the GECOS field.
References
  • {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1233043', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1233043', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2015:1482', 'name': 'https://access.redhat.com/errata/RHSA-2015:1482', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2015:1483', 'name': 'https://access.redhat.com/errata/RHSA-2015:1483', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/security/cve/CVE-2015-3245', 'name': 'https://access.redhat.com/security/cve/CVE-2015-3245', 'tags': [], 'refsource': 'MISC'}

02 Feb 2023, 20:20

Type Values Removed Values Added
Summary Incomplete blacklist vulnerability in the chfn function in libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, allows local users to cause a denial of service (/etc/passwd corruption) via a newline character in the GECOS field. It was found that libuser, as used by the chfn userhelper functionality, did not properly filter out newline characters in GECOS fields. A local, authenticated user could use this flaw to corrupt the /etc/passwd file, resulting in a denial-of-service on the system.
References
  • (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1233043 -
  • (MISC) https://access.redhat.com/errata/RHSA-2015:1482 -
  • (MISC) https://access.redhat.com/errata/RHSA-2015:1483 -
  • (MISC) https://access.redhat.com/security/cve/CVE-2015-3245 -
Information

Published : 2015-08-11 14:59

Updated : 2023-12-10 11:46

NVD link : CVE-2015-3245

Mitre link : CVE-2015-3245

CVE.ORG link : CVE-2015-3245

JSON object : View

Products Affected

redhat

  • libuser
CWE
CWE-20

Improper Input Validation