VDB-7026 · SA51299 · OSVDB 87859

OpenBSD 5.1/5.2 RFC Request Saturation Parsing openbsd_libc_portmap.c denial of service

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
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.
6.9$0-$5k0.00

A vulnerability was found in OpenBSD 5.1/5.2 (Operating System). It has been classified as critical. Affected is an unknown code block of the file openbsd_libc_portmap.c of the component RFC Request Saturation Parsing. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was released 11/22/2012 by auto236751 as OpenBSD implementation of the libc's RPC as not defined posting (Full-Disclosure). The advisory is available at archives.neohapsis.com. The vendor was not involved in the coordination of the public release. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. The real existence of this vulnerability is still doubted at the moment.

It is possible to mitigate the weakness by firewalling tcp/111 (sunrpc).

Further details are available at openbsd.org.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.5
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Firewalling: 🔍

Timelineinfo

11/22/2012 🔍
11/22/2012 +0 days 🔍
11/26/2012 +4 days 🔍
11/27/2012 +1 days 🔍
11/27/2012 +0 days 🔍
11/29/2012 +2 days 🔍
08/20/2017 +1725 days 🔍

Sourcesinfo

Advisory: OpenBSD implementation of the libc's RPC
Researcher: auto236751
Status: Not defined
Disputed: 🔍
SecurityTracker: 1027814 - OpenBSD libc RPC Processing Flaw Lets Remote Users Deny Service
Secunia: 51299 - OpenBSD Portmap Denial of Service Vulnerability, Less Critical
OSVDB: 87859

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍

Entryinfo

Created: 11/29/2012 10:17
Updated: 08/20/2017 22:15
Changes: 11/29/2012 10:17 (57), 08/20/2017 22:15 (3)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!