OpenBSD 6.6 libc gen/auth_subr.c Username weak authentication
| CVSS Meta Temp Score
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Current Exploit Price (β)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability. |
|---|---|---|
| 7.3 | $5k-$25k | 6.39 |
A vulnerability classified as critical was found in OpenBSD 6.6 (Operating System). Affected by this vulnerability is an unknown code block of the file gen/auth_subr.c of the component libc. The manipulation with the input value schallenge leads to a weak authentication vulnerability. The CWE definition for the vulnerability is CWE-287. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:
libc in OpenBSD 6.6 allows authentication bypass via the -schallenge username, as demonstrated by smtpd, ldapd, or radiusd. This is related to gen/auth_subr.c and gen/authenticate.c in libc (and login/login.c and xenocara/app/xenodm/greeter/verify.c).
The weakness was presented 12/05/2019 (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2019-19521. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 12/05/2019). Due to its background and reception, this vulnerability has a historic impact.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
See 146681 and 146682 for similar entries.
Type
Name
VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3
VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: π
VulDB Reliability: π
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| π | π | π | π | π | π |
| π | π | π | π | π | π |
| π | π | π | π | π | π |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| unlock | unlock | unlock | unlock | unlock | unlock |
| unlock | unlock | unlock | unlock | unlock | unlock |
| unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: π
VulDB Temp Score: π
VulDB Reliability: π
Class: Weak authentication (CWE-287)
Local: No
Remote: Yes
Availability: π
Status: Not defined
Price Prediction: π
Current Price Estimation: π
| 0-Day | unlock | unlock | unlock | unlock |
|---|---|---|---|---|
| Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Threat: π
Adversaries: π
Geopolitics: π
Economy: π
Predictions: π
Remediation: πRecommended: no mitigation known
0-Day Time: π
12/05/2019 Advisory disclosed
12/05/2019 VulDB entry created
12/05/2019 VulDB last updateAdvisory: openwall.com
CVE: CVE-2019-19521 (π)
See also: π
Created: 12/05/2019 08:31 AM
Complete: π
Comments
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