python-ldap up to 3.3.x LDAP Schema Parser incorrect regex
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
4.1 | $0-$5k | 0.00 |
A vulnerability classified as critical was found in python-ldap up to 3.3.x (Programming Language Software). Affected by this vulnerability is an unknown code block of the component LDAP Schema Parser. The manipulation with an unknown input leads to a incorrect regex vulnerability. The CWE definition for the vulnerability is CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. As an impact it is known to affect availability. The summary by CVE is:
python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability to cause a denial of service condition.
The weakness was published 06/19/2022 as GHSA-r8wq-qrxc-hmcm. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2021-46823 since 06/18/2022. The technical details are unknown and an exploit is not publicly available.
Upgrading to version 3.4.0 eliminates this vulnerability.
The vulnerability is also documented in the vulnerability database at X-Force (221507).
Product
Type
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: 4.3VulDB Meta Temp Score: 4.1
VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Incorrect regexCWE: CWE-185 / CWE-697
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: python-ldap 3.4.0
Timeline
06/18/2022 🔍06/19/2022 🔍
06/19/2022 🔍
06/19/2022 🔍
Sources
Advisory: GHSA-r8wq-qrxc-hmcmStatus: Confirmed
CVE: CVE-2021-46823 (🔍)
X-Force: 221507
Entry
Created: 06/19/2022 08:08Changes: 06/19/2022 08:08 (42)
Complete: 🔍
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