Ruby 1.8.6/1.8.6-420/1.8.7/1.8.7-330/1.8.8 Safe Level #to_s access control
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.9 | $0-$5k | 0.00 |
A vulnerability classified as problematic has been found in Ruby 1.8.6/1.8.6-420/1.8.7/1.8.7-330/1.8.8 (Programming Language Software). Affected is the function #to_s
of the component Safe Level. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, and integrity. CVE summarizes:
The safe-level feature in Ruby 1.8.6 through 1.8.6-420, 1.8.7 through 1.8.7-330, and 1.8.8dev allows context-dependent attackers to modify strings via the Exception#to_s method, as demonstrated by changing an intended pathname.
The weakness was disclosed 02/21/2011 with Ruby Dev-Team (Website). The advisory is available at ruby-lang.org. This vulnerability is traded as CVE-2011-1005 since 02/14/2011. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.
It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 69732 (Amazon Linux AMI : ruby (ALAS-2013-173)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350573 (Amazon Linux Security Advisory for ruby: ALAS-2013-173).
Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ruby-lang.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (69732). The entries 7822, 56925, 58071 and 64068 are pretty similar.
Product
Type
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.5VulDB Meta Temp Score: 5.9
VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Access controlCWE: CWE-264
ATT&CK: T1068
Local: No
Remote: Yes
Availability: 🔍
Status: Proof-of-Concept
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 69732
Nessus Name: Amazon Linux AMI : ruby (ALAS-2013-173)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍
OpenVAS ID: 880953
OpenVAS Name: CentOS Update for irb CESA-2011:0908 centos4 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Patch: ruby-lang.org
Timeline
02/14/2011 🔍02/18/2011 🔍
02/18/2011 🔍
02/18/2011 🔍
02/21/2011 🔍
02/21/2011 🔍
03/02/2011 🔍
03/03/2011 🔍
03/09/2011 🔍
03/21/2011 🔍
09/04/2013 🔍
03/19/2021 🔍
Sources
Advisory: ruby-lang.orgOrganization: Ruby Dev-Team
Status: Not defined
Confirmation: 🔍
CVE: CVE-2011-1005 (🔍)
OVAL: 🔍
Vulnerability Center: 30270 - Ruby Allows Remote Attackers to Modify Strings via the Exception#to_s Method, Medium
SecurityFocus: 46458 - Ruby "#to_s" Security Bypass Vulnerability
Secunia: 43420 - Ruby "#to_s" Safe Level Security Bypass Vulnerability, Less Critical
OSVDB: 70957 - Ruby Exception#to_s Method Safe Level Security Bypass
Vupen: ADV-2011-0539
See also: 🔍
Entry
Created: 03/21/2011 01:00Updated: 03/19/2021 06:53
Changes: 03/21/2011 01:00 (79), 03/18/2017 08:06 (12), 03/19/2021 06:53 (3)
Complete: 🔍
No comments yet. Languages: en.
Please log in to comment.