CVE-2015-3245
Libuser Usermode Incomplete Blacklist DoS
Description
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.
INFO
Published Date :
Aug. 11, 2015, 2:59 p.m.
Last Modified :
Feb. 13, 2023, 12:48 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
2.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2015-3245 has a 2 public PoC/Exploit
available at Github.
Go to the Public Exploits
tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2015-3245
.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Makefile Shell C Perl Python
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Python Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2015-3245
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2015-3245
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 13, 2023
Action Type Old Value New Value Changed Description 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. Removed CVSS V2 Red Hat, Inc. (AV:L/AC:L/Au:S/C:N/I:N/A:P) Removed Reference https://access.redhat.com/errata/RHSA-2015:1482 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2015:1483 [No Types Assigned] Removed Reference https://access.redhat.com/security/cve/CVE-2015-3245 [No Types Assigned] Removed Reference https://bugzilla.redhat.com/show_bug.cgi?id=1233043 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed Description 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. Added CVSS V2 Red Hat, Inc. (AV:L/AC:L/Au:S/C:N/I:N/A:P) Added Reference https://access.redhat.com/security/cve/CVE-2015-3245 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2015:1483 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2015:1482 [No Types Assigned] Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1233043 [No Types Assigned] -
CVE Modified by [email protected]
May. 20, 2018
Action Type Old Value New Value Added Reference https://www.exploit-db.com/exploits/44633/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 21, 2017
Action Type Old Value New Value Added Reference http://www.securitytracker.com/id/1033040 [No Types Assigned] -
CVE Modified by [email protected]
Dec. 24, 2016
Action Type Old Value New Value Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html [No Types Assigned] Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html [No Types Assigned] -
CVE Modified by [email protected]
Nov. 28, 2016
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/76021 [No Types Assigned] -
CVE Translated by [email protected]
Aug. 26, 2015
Action Type Old Value New Value Removed Translation Vulnerabilidad de lista negra incompleta en la función chfn en libuser en versiones anteriores a 0.56.13-8 y 0.60 anterior a 0.60-7, como se utiliza en el programa userhelp en el paquete usermode, permite a usuarios locales provocar una denegación de servicio (/etc/passwd corruption) a través de un caracter de nueva línea en el campo GECOS. Added Translation Vulnerabilidad de lista negra incompleta en la función chfn en libuser en versiones anteriores a 0.56.13-8 y 0.60 en versiones anteriores a 0.60-7, tal como se utiliza en el programa userhelp en el paquete usermode, permite a usuarios locales provocar una denegación de servicio (/etc/passwd corruption) a través de un caracter de nueva línea en el campo GECOS. -
Modified Analysis by [email protected]
Aug. 11, 2015
Action Type Old Value New Value Added CPE Configuration Configuration 1 OR *cpe:2.3:a:redhat:libuser:0.56.13-5:*:*:*:*:*:*:* (and previous) *cpe:2.3:a:redhat:libuser:0.60-6:*:*:*:*:*:*:* *cpe:2.3:a:redhat:libuser:0.60-5:*:*:*:*:*:*:* *cpe:2.3:a:redhat:libuser:0.60-4:*:*:*:*:*:*:* *cpe:2.3:a:redhat:libuser:0.60-3:*:*:*:*:*:*:* *cpe:2.3:a:redhat:libuser:0.60-2:*:*:*:*:*:*:* *cpe:2.3:a:redhat:libuser:0.60-1:*:*:*:*:*:*:* Added CVSS V2 (AV:L/AC:L/Au:N/C:N/I:N/A:P) Changed Reference Type https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt No Types Assigned https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt Exploit Added CWE CWE-20 -
Initial Analysis by [email protected]
Aug. 11, 2015
Action Type Old Value New Value -
Initial Analysis by [email protected]
Aug. 11, 2015
Action Type Old Value New Value
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2015-3245
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2015-3245
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05635
percentile