Yubico PAM Module up to 2.9 pam_sm_authenticate input validation
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.6 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, has been found in Yubico PAM Module up to 2.9. Affected by this issue is the function pam_sm_authenticate
. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:
Yubico PAM Module before 2.10 performed user authentication when 'use_first_pass' PAM configuration option was not used and the module was configured as 'sufficient' in the PAM configuration. A remote attacker could use this flaw to circumvent common authentication process and obtain access to the account in question by providing a NULL value (pressing Ctrl-D keyboard sequence) as the password string.
The bug was discovered 08/26/2011. The weakness was shared 11/26/2019. This vulnerability is handled as CVE-2011-4120 since 10/18/2011. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.
The vulnerability was handled as a non-public zero-day exploit for at least 76 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 57142 (Fedora 16 : pam_yubico-2.8-1.fc16 / ykclient-2.6-1.fc16 / yubikey-val-2.10-1.fc16 (2011-15580)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l.
Upgrading to version 2.10 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (57142).
Product
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.7VulDB Meta Temp Score: 7.6
VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 9.8
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Input validationCWE: CWE-20
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 57142
Nessus Name: Fedora 16 : pam_yubico-2.8-1.fc16 / ykclient-2.6-1.fc16 / yubikey-val-2.10-1.fc16 (2011-15580)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 863968
OpenVAS Name: Fedora Update for pam_yubico FEDORA-2011-15580
OpenVAS File: 🔍
OpenVAS Family: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Yubico PAM Module 2.10
Timeline
08/26/2011 🔍10/18/2011 🔍
11/10/2011 🔍
12/13/2011 🔍
11/26/2019 🔍
11/26/2019 🔍
02/28/2024 🔍
Sources
Advisory: access.redhat.comStatus: Not defined
CVE: CVE-2011-4120 (🔍)
SecurityFocus: 50557
OSVDB: 76907
Entry
Created: 11/26/2019 09:35Updated: 02/28/2024 06:59
Changes: 11/26/2019 09:35 (42), 11/26/2019 09:40 (28), 02/28/2024 06:59 (4)
Complete: 🔍
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