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 malforme
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.
- Published
- Dec 19, 2019
- Updated
- Jun 16, 2026
- EPSS
- 8.0% · 95th percentile
- CWE
- CWE-193
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Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 8.0%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| cyrusimap | cyrus-sasl | cpe:2.3:a:cyrusimap:cyrus-sasl |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| redhat | jboss enterprise web server | cpe:2.3:a:redhat:jboss_enterprise_web_server |
| apple | mac os x | cpe:2.3:o:apple:mac_os_x |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| redhat | enterprise linux eus | cpe:2.3:o:redhat:enterprise_linux_eus |
| redhat | enterprise linux for ibm z systems | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems |
| redhat | enterprise linux for ibm z systems eus | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus |
| redhat | enterprise linux for power little endian | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian |
| redhat | enterprise linux for power little endian eus | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus |
and 8 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache bookkeeper4.12.1
- apple ipados13.6
- apple iphone os13.6
- apple mac os x10.15.0 and later · before 10.15.6
- apple mac os x10.13.0 and later · before 10.13.6
- apple mac os xbefore 10.13.6
- apple mac os x10.13.6
- apple mac os x10.14.6
- canonical ubuntu linux12.04
- canonical ubuntu linux14.04
- canonical ubuntu linux16.04
- canonical ubuntu linux18.04
- canonical ubuntu linux19.10
- cyrusimap cyrus-saslbefore 2.1.28
- debian debian linux10.0
- debian debian linux8.0
- debian debian linux9.0
- fedoraproject fedora31
- fedoraproject fedora32
- redhat enterprise linux5.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | cyrus-sasl-sql | before 2.1.27-5.el8 | 2.1.27-5.el8 |
| Alpine:v3.10 | cyrus-sasl | before 2.1.27-r4 | 2.1.27-r4 |
| Alpine:v3.11 | cyrus-sasl | before 2.1.27-r5 | 2.1.27-r5 |
| Alpine:v3.8 | cyrus-sasl | before 2.1.26-r15 | 2.1.26-r15 |
| Alpine:v3.9 | cyrus-sasl | before 2.1.27-r2 | 2.1.27-r2 |
| Debian:10 | cyrus-sasl2 | before 2.1.27+dfsg-1+deb10u1 | 2.1.27+dfsg-1+deb10u1 |
| Debian:12 | cyrus-sasl2 | before 2.1.27+dfsg-2 | 2.1.27+dfsg-2 |
| Debian:8 | cyrus-sasl2 | before 2.1.26.dfsg1-13+deb8u2 | 2.1.26.dfsg1-13+deb8u2 |
| Debian:9 | cyrus-sasl2 | before 2.1.27~101-g0780600+dfsg-3+deb9u1 | 2.1.27~101-g0780600+dfsg-3+deb9u1 |
| openSUSE:Tumbleweed | cyrus-sasl | before 2.1.27-5.7 | 2.1.27-5.7 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-debugsource | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-devel-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-gs2-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-gssapi-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-ldap-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-lib-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-md5-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-ntlm-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-plain-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-scram-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-sql | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::appstream | cyrus-sasl-sql-debuginfo | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
| Red Hat:enterprise_linux:8::baseos | cyrus-sasl | before 0:2.1.27-5.el8 | 0:2.1.27-5.el8 |
+16
Same product
cyrusimap: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-24407In Cyrus SASL 2.1.17 through 2.1.27 before 2.1.28, plugins/sql.c does not escape the password for a SQL INSERT or UPDATE statement.36Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:cyrus-sasl-sql | 2.1.27-5.el8 · AlmaLinux:8 | Package registry (OSV) |
| alpine:cyrus-sasl | 2.1.27-r4 · Alpine:v3.10 | Package registry (OSV) |
| debian:cyrus-sasl2 | 2.1.27+dfsg-2 · Debian:12 | Package registry (OSV) |
| opensuse:cyrus-sasl | 2.1.27-5.7 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:cyrus-sasl-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-debugsource | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-devel-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-gs2-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-gssapi-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-ldap-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-lib-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-md5-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-ntlm-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-plain-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-scram-debuginfo | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:cyrus-sasl-sql | 0:2.1.27-5.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| rocky linux:cyrus-sasl | 0:2.1.27-5.el8 · Rocky Linux:8 | Package registry (OSV) |
| suse:cyrus-sasl | 2.1.22-182.26.4.1 · SUSE:Linux Enterprise Point of Sale 11 SP3 | Package registry (OSV) |
| suse:cyrus-sasl-openssl1 | 2.1.22-182.26.4.1 · SUSE:Linux Enterprise Server 11-SECURITY | Package registry (OSV) |
| suse:cyrus-sasl-saslauthd | 2.1.22-182.26.4.1 · SUSE:Linux Enterprise Point of Sale 11 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-193 · Off-by-one ErrorCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- seclists.org/fulldisclosure/2020/Jul/23
- seclists.org/fulldisclosure/2020/Jul/24
- www.openwall.com/lists/oss-security/2022/02/23/4
- github.com/cyrusimap/cyrus-sasl/issues/587
- lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- lists.debian.org/debian-lts-announce/2019/12/msg00027.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MW6GZCLECGL2PBNHVNPJIX4RPVRVFR7R/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OB4GSVOJ6ESHQNT5GSV63OX5D4KPSTGT/
- seclists.org/bugtraq/2019/Dec/42
- support.apple.com/kb/HT211288
- support.apple.com/kb/HT211289
- usn.ubuntu.com/4256-1/
- www.debian.org/security/2019/dsa-4591
Vendor advisories and official records. Exploit/PoC links are deliberately left out.