PT-2019-4873 · Cyrus+8 · Cyrus-Sasl+8

Stephan Zeisberg · Published 2019-11-25 · Updated 2024-07-01 · CVE-2019-19906

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions cyrus-sasl version 2.1.27

Description The issue is related to an out-of-bounds write that can cause an unauthenticated remote denial-of-service in OpenLDAP via a malformed LDAP packet. This is ultimately caused by an off-by-one error in the sasl add string function in common.c in cyrus-sasl. The vulnerability is associated with incorrect handling of an LDAP packet, which can be exploited by a remote attacker to cause a denial-of-service.

Recommendations For cyrus-sasl version 2.1.27, consider applying a patch to fix the off-by-one error in the sasl add string function to prevent the out-of-bounds write. As a temporary workaround, restrict access to the LDAP service to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Memory Corruption

Weakness Enumeration

CWE-193

CWE-787

Related Identifiers

ALSA-2020:4497

ALT-PU-2024-2957

ALT-PU-2024-4059

ALT-PU-2024-4539

ALT-PU-2024-8928

AZL-6369

BDU:2020-01461

CESA-2020_4497

CVE-2019-19906

DLA-2044-1

DSA-4591-1

MGASA-2020-0011

OPENSUSE-SU-2024:10709-1

RHSA-2020:4497

RHSA-2020_4497

RLSA-2020:4497

SUSE-SU-2020:14579-1

SUSE-SU-2020:3939-1

SUSE-SU-2020_14579-1

SUSE-SU-2020_3939-1

SUSE-SU-2022:3549-1

SUSE-SU-2022_3549-1

USN-4256-1

Affected Products

Alt Linux

Almalinux

Centos

Openldap

Red Hat

Rocky Linux

Suse

Ubuntu

Cyrus-Sasl

References · 58

• 🔥 https://openldap.org/its/index.cgi/Incoming?id=9123 · Exploit
• https://github.com/cyrusimap/cyrus-sasl/issues/587 · Patch
• https://wiki.astralinux.ru/astra-linux-se15-bulletin-20201201SE15 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2020:4497 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4591-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:14579-1 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2044-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-01461 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-19906 · Security Note
• https://osv.dev/vulnerability/RLSA-2020:4497 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19906 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-6369 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2019-19906 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-19906 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-19906 · Security Note