CVE-2019-19906
published 2019-12-19CVE-2019-19906: 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…
PriorityP346high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
8.04%
94.8th percentile
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
63 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | bookkeeper | — | — |
| apple | ios_13.6_and_ipados | — | — |
| apple | ipados | — | — |
| apple | iphone_os | — | — |
| apple | mac_os_x | < 10.13.6 | 10.13.6 |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
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CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_redhat7.5HIGH
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CISA ICS
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
cisa_ics·2023-12-14
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
ICS Advisory
##
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
Release DateDecember 14, 2023
Alert CodeICSA-23-348-10
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
- Vulnerabilities: Improper Restriction of XML External Entity Reference, Time-of-check Time-of-use (TOCTOU) Race Condition, Command Injection, Miss
Apple
CVE-2019-19906: iOS 13.6 and iPadOS 13.6
vendor_apple·2020-07-15·CVSS 7.5
CVE-2019-19906 [HIGH] CVE-2019-19906: iOS 13.6 and iPadOS 13.6
Apple Security Update: About the security content of iOS 13.6 and iPadOS 13.6
Product: iOS 13.6 and iPadOS
Version: 13.6
CVE: CVE-2019-19906
Component: CVE-2019-19906
Apple
CVE-2019-19906: macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra
vendor_apple·2020-07-15·CVSS 7.5
CVE-2019-19906 [HIGH] CVE-2019-19906: macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra
Apple Security Update: About the security content of macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra
Product: macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra
CVE: CVE-2019-19906
Component: CVE-2019-19906
Ubuntu
Cyrus SASL vulnerability
vendor_ubuntu·2020-01-28
CVE-2019-19906 Cyrus SASL vulnerability
Title: Cyrus SASL vulnerability
Summary: Cyrus SASL could be made to crash or execute arbitrary code if it received
a specially crafted LDAP packet.
It was discovered that Cyrus SASL incorrectly handled certain LDAP packets.
An attacker could possibly use this issue to execute arbitrary code or cause
a denial of service.
Instructions: After a standard system update you need to restart services using
SASL to effect the necessary changes.
Microsoft
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
vendor_msrc·2019-12-10·CVSS 7.5
CVE-2019-19906 [HIGH] CWE-787 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
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.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If
Red Hat
cyrus-sasl: denial of service in _sasl_add_string function
vendor_redhat·2019-11-28·CVSS 7.5
CVE-2019-19906 [HIGH] CWE-400 cyrus-sasl: denial of service in _sasl_add_string function
cyrus-sasl: denial of service in _sasl_add_string function
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.
Package: cyrus-sasl (Red Hat Enterprise Linux 5) - Out of support scope
Package: cyrus-sasl (Red Hat Enterprise Linux 6) - Out of support scope
Package: cyrus-sasl (Red Hat Enterprise Linux 7) - Will not fix
Package: cyrus-sasl (Red Hat JBoss Enterprise Web Server 2) - Out of support scope
Debian
CVE-2019-19906: cyrus-sasl2 - cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthe...
vendor_debian·2019·CVSS 7.5
CVE-2019-19906 [HIGH] CVE-2019-19906: cyrus-sasl2 - cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthe...
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.
Scope: local
bookworm: resolved (fixed in 2.1.27+dfsg-2)
bullseye: resolved (fixed in 2.1.27+dfsg-2)
forky: resolved (fixed in 2.1.27+dfsg-2)
sid: resolved (fixed in 2.1.27+dfsg-2)
trixie: resolved (fixed in 2.1.27+dfsg-2)
GHSA
GHSA-vc8v-7256-2pfq: cyrus-sasl (aka Cyrus SASL) 2
ghsa_unreviewed·2022-05-24
CVE-2019-19906 [MEDIUM] CWE-787 GHSA-vc8v-7256-2pfq: cyrus-sasl (aka Cyrus SASL) 2
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.
OSV
CVE-2019-19906: cyrus-sasl (aka Cyrus SASL) 2
osv·2019-12-19·CVSS 7.5
CVE-2019-19906 [HIGH] CVE-2019-19906: cyrus-sasl (aka Cyrus SASL) 2
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-19906 cyrus-sasl: denial of service in _sasl_add_string function [fedora-all]
bugzilla·2020-02-18·CVSS 7.5
CVE-2019-19906 [HIGH] CVE-2019-19906 cyrus-sasl: denial of service in _sasl_add_string function [fedora-all]
CVE-2019-19906 cyrus-sasl: denial of service in _sasl_add_string function [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported
Bugzilla
CVE-2019-19906 cyrus-sasl: denial of service in _sasl_add_string function
bugzilla·2020-01-16·CVSS 7.5
CVE-2019-19906 [HIGH] CVE-2019-19906 cyrus-sasl: denial of service in _sasl_add_string function
CVE-2019-19906 cyrus-sasl: denial of service in _sasl_add_string function
A vulnerability was found in cyrus-sasl 2.1.27, where off-by-one error was detected in function _sasl_add_string in common.c.
Reference:
https://github.com/cyrusimap/cyrus-sasl/issues/587
http://www.openldap.org/its/index.cgi/Incoming?id=9123
Discussion:
Analysis:
This is essentially an off-by-one, causing a heap OOB read by 1 byte. Arbitrary code execution seems difficult because of the assertions in place, so all it can do is cause remote DoS of the SASL service. Currently there is no upstream patch for this.
---
Created cyrus-sasl tracking bugs for this issue:
Affects: fedora-all [bug 1804034]
---
FEDORA-2020-51d591d035 has been pushed to the Fedora 32 stable repository.
If problem still persists, please
http://seclists.org/fulldisclosure/2020/Jul/23http://seclists.org/fulldisclosure/2020/Jul/24http://www.openwall.com/lists/oss-security/2022/02/23/4https://github.com/cyrusimap/cyrus-sasl/issues/587https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.debian.org/debian-lts-announce/2019/12/msg00027.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MW6GZCLECGL2PBNHVNPJIX4RPVRVFR7R/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OB4GSVOJ6ESHQNT5GSV63OX5D4KPSTGT/https://seclists.org/bugtraq/2019/Dec/42https://support.apple.com/kb/HT211288https://support.apple.com/kb/HT211289https://usn.ubuntu.com/4256-1/https://www.debian.org/security/2019/dsa-4591https://www.openldap.org/its/index.cgi/Incoming?id=9123http://seclists.org/fulldisclosure/2020/Jul/23http://seclists.org/fulldisclosure/2020/Jul/24http://www.openwall.com/lists/oss-security/2022/02/23/4https://github.com/cyrusimap/cyrus-sasl/issues/587https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.debian.org/debian-lts-announce/2019/12/msg00027.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MW6GZCLECGL2PBNHVNPJIX4RPVRVFR7R/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OB4GSVOJ6ESHQNT5GSV63OX5D4KPSTGT/https://seclists.org/bugtraq/2019/Dec/42https://support.apple.com/kb/HT211288https://support.apple.com/kb/HT211289https://usn.ubuntu.com/4256-1/https://www.debian.org/security/2019/dsa-4591https://www.openldap.org/its/index.cgi/Incoming?id=9123https://cert-portal.siemens.com/productcert/html/ssa-398330.html
2019-12-19
Published