SB2021020601 - Multiple vulnerabilities in OpenLDAP

Main Vulnerability Database SB2021020601

SB2021020601 - Multiple vulnerabilities in OpenLDAP

Published: February 6, 2021

Security Bulletin ID SB2021020601

Severity

Medium

Patch available

YES

Number of vulnerabilities 10

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 10 secuirty vulnerabilities.

1) Integer underflow (CVE-ID: CVE-2020-36221)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to integer underflow within the serialNumberAndIssuerCheck() function in schema_init.c. A remote attacker can send a specially crafted request to the affected application, trigger an integer underflow and crash the slapd.

2) Release of invalid pointer or reference (CVE-ID: CVE-2020-36224)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to release of an invalid pointer when processing saslAuthzTo requests. A remote attacker can send a specially crafted request to slapd and perform a denial of service (DoS) attack.

3) Reachable Assertion (CVE-ID: CVE-2020-36230)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when parsing the X.509 DN within the ber_next_element() function in decode.c. A remote attacker can send a specially crafted request to slapd and perform a denial of service (DoS) attack.

4) Type Confusion (CVE-ID: CVE-2020-36229)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a type confusion error in ldap_X509dn2bv when parsing X.509 DN in ad_keystring. A remote attacker can send a specially crafted request to slapd and crash it.

5) Integer underflow (CVE-ID: CVE-2020-36228)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to integer underflow when processing the certificate list exact assertion. A remote attacker can send a specially crafted request to the slapd, trigger integer underflow and perform a denial of service (DoS) attack.

6) Infinite loop (CVE-ID: CVE-2020-36227)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in slapd with the cancel_extop Cancel operation. A remote attacker can send a specially crafted request and perform a denial of service conditions.

7) Resource management error (CVE-ID: CVE-2020-36226)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application leading to a memch->bv_len miscalculation during saslAuthzTo processing. A remote attacker can send specially crafted request to the slapd and perform a denial of service (DoS) attack.

8) Double Free (CVE-ID: CVE-2020-36225)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the saslAuthzTo processing. A remote attacker can send a specially crafted request to the slapd, trigger a double free error and perform a denial of service (DoS) attack

9) Double Free (CVE-ID: CVE-2020-36223)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error during the Values Return Filter control handling. A remote attacker can send a specially crafted request to the slapd, trigger a double free error and perform a denial of service (DoS) attack.

10) Reachable Assertion (CVE-ID: CVE-2020-36222)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion in slapd in the saslAuthzTo validation. A remote attacker can send a specially crafted request and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References