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CVE-2019-19906

HIGH
7.5
CVSS Score
Published: December 19, 2019 at 05:39 PM UTC
Updated: October 14, 2026 at 08:16 AM UTC
20 products affected across 8 vendorsmacOSDebian LinuxFedora· also runs on 1 platform

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Severity
HIGH7.5
Exploit prediction
EPSS 8%

Description

cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthenticated remote denial-of-service in OpenLDAP via a malformed LDAP packet. The OpenLDAP crash is ultimately caused by an off-by-one error in _sasl_add_string in common.c in cyrus-sasl.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Bookkeeper· Apache
95%
4.12.1
centos-centos (environment)
iPadOS· Apple
95%
13.6
iPhone OS· Apple
95%
13.6
macOS· Apple
95%
v < 10.13.610.13.0 ≤ v < 10.13.610.15.0 ≤ v < 10.15.610.13.610.13.6 security_update_2018-00210.13.6 security_update_2018-00310.13.6 security_update_2019-00110.13.6 security_update_2019-00210.13.6 security_update_2019-00310.13.6 security_update_2019-00410.13.6 security_update_2019-00510.13.6 security_update_2019-00610.13.6 security_update_2019-00710.13.6 security_update_2020-00110.13.6 security_update_2020-00210.13.6 security_update_2020-00310.14.610.14.6 security_update_2019-00110.14.6 security_update_2019-00210.14.6 security_update_2019-00410.14.6 security_update_2019-00510.14.6 security_update_2019-00610.14.6 security_update_2019-00710.14.6 security_update_2020-00110.14.6 security_update_2020-00210.14.6 security_update_2020-003
Affected range stops below 10.13.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.15.6, so it looks safe — our inference, not a vendor statement
Ubuntu Linux· Canonicalrubygems
95%
12.0414.0416.0418.0419.10
Cyrus Sasl· Cyrusimap
95%
All versionsv < 2.1.28
Affected range stops below 2.1.28, so it looks safe — our inference, not a vendor statement
Debian Linux· Debiandrupal
95%
10.08.09.0
Fedora· Fedora Projectrpm
95%
3132
Enterprise Linux· Red Hatrpm
95%
5.06.07.08.0
Enterprise Linux Eus· Red Hatrpm
95%
8.4

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

References (16)

Mailing Listx_refsource_FULLDISCThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2020/Jul/23
Mailing Listx_refsource_FULLDISCThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2020/Jul/24
Mailing Listx_refsource_MLISTPatchRelease NotesThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2022/02/23/4
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/cyrusimap/cyrus-sasl/issues/587
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2019/12/msg00027.html
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MW6GZCLECGL2PBNHVNPJIX4RPVRVFR7R/

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-193CWE-787

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