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TI-2006-01667 Aliases CVE-2006-1721GHSA-x5mm-w7g6-r6fq

digestmd5.c in the CMU Cyrus Simple Authentication and Security Layer (SASL) library…

Priority LOW 18CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · Partial
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.

Summary

digestmd5.c in the CMU Cyrus Simple Authentication and Security Layer (SASL) library 2.1.18, and possibly other versions before 2.1.21, allows remote unauthenticated attackers to cause a denial of service (segmentation fault) via malformed inputs in DIGEST-MD5 negotiation.

Why it matters now

EPSS 0.02488 84th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:cyrus:sasl:2.1.18:*:*:*:*:*:*:*2.1.18VulnerableCyrus
cpe:2.3:a:cyrus:sasl:2.1.18_r1:*:*:*:*:*:*:*2.1.18_r1VulnerableCyrus
cpe:2.3:a:cyrus:sasl:2.1.18_r2:*:*:*:*:*:*:*2.1.18_r2VulnerableCyrus
cpe:2.3:a:cyrus:sasl:2.1.19:*:*:*:*:*:*:*2.1.19VulnerableCyrus
cpe:2.3:a:cyrus:sasl:2.1.20:*:*:*:*:*:*:*2.1.20VulnerableCyrus
  • cpe:2.3:a:cyrus:sasl:2.1.18:*:*:*:*:*:*:* Versions 2.1.18 Vulnerable ·Cyrus
  • cpe:2.3:a:cyrus:sasl:2.1.18_r1:*:*:*:*:*:*:* Versions 2.1.18_r1 Vulnerable ·Cyrus
  • cpe:2.3:a:cyrus:sasl:2.1.18_r2:*:*:*:*:*:*:* Versions 2.1.18_r2 Vulnerable ·Cyrus
  • cpe:2.3:a:cyrus:sasl:2.1.19:*:*:*:*:*:*:* Versions 2.1.19 Vulnerable ·Cyrus
  • cpe:2.3:a:cyrus:sasl:2.1.20:*:*:*:*:*:*:* Versions 2.1.20 Vulnerable ·Cyrus

Remediation

Red Hat 2 advisories

  • RHSA-2007:0878 Released 2007-09-04 · Red Hat rating Moderate
    cyrus-sasl security update
    • Red Hat Desktop version 3 cyrus-sasl-2.1.15-15, cyrus-sasl-2.1.15-15.i386, cyrus-sasl-devel-2.1.15-15 +7
    • Red Hat Enterprise Linux AS version 3 cyrus-sasl-2.1.15-15, cyrus-sasl-2.1.15-15.i386, cyrus-sasl-2.1.15-15.ia64 +17
    • Red Hat Enterprise Linux ES version 3 cyrus-sasl-2.1.15-15, cyrus-sasl-2.1.15-15.i386, cyrus-sasl-2.1.15-15.ia64 +12
    • Red Hat Enterprise Linux WS version 3 cyrus-sasl-2.1.15-15, cyrus-sasl-2.1.15-15.i386, cyrus-sasl-2.1.15-15.ia64 +12
  • RHSA-2007:0795 Released 2007-09-04 · Red Hat rating Moderate
    cyrus-sasl security and bug fix update
    • Red Hat Enterprise Linux AS version 4 cyrus-sasl-2.1.19-14, cyrus-sasl-2.1.19-14.i386, cyrus-sasl-2.1.19-14.ia64 +25
    • Red Hat Enterprise Linux Desktop version 4 cyrus-sasl-2.1.19-14, cyrus-sasl-2.1.19-14.i386, cyrus-sasl-devel-2.1.19-14 +11
    • Red Hat Enterprise Linux ES version 4 cyrus-sasl-2.1.19-14, cyrus-sasl-2.1.19-14.i386, cyrus-sasl-2.1.19-14.ia64 +18
    • Red Hat Enterprise Linux WS version 4 cyrus-sasl-2.1.19-14, cyrus-sasl-2.1.19-14.i386, cyrus-sasl-2.1.19-14.ia64 +18

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Desktop version 3Fixed RHSA-2007:0878
Red Hat Enterprise Linux AS version 3Fixed RHSA-2007:0878
Red Hat Enterprise Linux AS version 4Fixed RHSA-2007:0795
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2007:0795
Red Hat Enterprise Linux ES version 3Fixed RHSA-2007:0878
Red Hat Enterprise Linux ES version 4Fixed RHSA-2007:0795
Red Hat Enterprise Linux WS version 3Fixed RHSA-2007:0878
Red Hat Enterprise Linux WS version 4Fixed RHSA-2007:0795

Timeline

  1. 2026-10-02 Threatist record created from CVE-2006-1721
  2. 2026-10-03 Alias added: GHSA-x5mm-w7g6-r6fq

References

Patch 1

Advisory 12

Other 5

  • TI-2005-00335 Buffer overflow in digestmd5.c CVS release 1.170 (also referred to as digestmda5.c), as… CVSS 2.0HIGH 7.5
  • TI-2002-01962 SQL injection vulnerability in the LDAP and MySQL authentication patch for Cyrus SASL… CVSS 2.0HIGH 7.5
  • TI-2004-00802 The (1) libsasl and (2) libsasl2 libraries in Cyrus-SASL 2.1.18 and earlier trust the… CVSS 2.0HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences