(smtpd): Crash due to improper management of SASL handlers for SMTP sessions
Published May 13, 2011
6.8
MEDIUMCVSS 2.0
EPSS 21.48%
Description
The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3, when certain Cyrus SASL authentication methods are enabled, does not create a new server handle after client authentication fails, which allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) or possibly execute arbitrary code via an invalid AUTH command with one method followed by an AUTH command with a different method.
Affected products
No data.
Configuration 1
- 2.0.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.0.4
- 2.0.5
- 2.0.6
- 2.0.7
- 2.0.8
- 2.0.9
- 2.0.10
- 2.0.11
- 2.0.12
- 2.0.13
- 2.0.14
- 2.0.15
- 2.0.16
- 2.0.17
- 2.0.18
- 2.0.19
- 2.1.0
- 2.1.1
- 2.1.2
- 2.1.3
- 2.1.4
- 2.1.5
- 2.1.6
- 2.2.0
- 2.2.1
- 2.2.2
- 2.2.3
- 2.2.4
- 2.2.5
- 2.2.6
- 2.2.7
- 2.2.8
- 2.2.9
- 2.2.10
- 2.2.11
- 2.2.12
- 2.3
- 2.3.0
- 2.3.1
- 2.3.2
- 2.3.3
- 2.3.4
- 2.3.5
- 2.3.6
- 2.3.7
- 2.3.8
- 2.3.9
- 2.3.10
- 2.3.11
- 2.3.12
- 2.3.13
- 2.3.14
- 2.3.15
- 2.3.16
- 2.3.17
- 2.3.18
- 2.3.19
- 2.4
- 2.4.0
- 2.4.1
- 2.4.2
- 2.4.3
- 2.4.4
- 2.4.5
- 2.4.6
- 2.4.7
- 2.4.8
- 2.4.9
- 2.4.10
- 2.4.11
- 2.4.12
- 2.4.13
- 2.4.14
- 2.4.15
- 2.5.0
- 2.5.1
- 2.5.2
- 2.5.3
- 2.5.4
- 2.5.5
- 2.5.6
- 2.5.7
- 2.5.8
- 2.5.9
- 2.5.10
- 2.5.11
- 2.5.12
Configuration 2
- 2.6
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
- 2.6.6
- 2.6.7
- 2.6.8
- 2.6.9
Configuration 3
No data.
Red Hat Enterprise Linux 4
postfix-2:2.2.10-1.5.el4
Fixed · RHSA-2011:0843
Red Hat Enterprise Linux 5
postfix-2:2.3.3-2.3.el5_6
Fixed · RHSA-2011:0843
Red Hat Enterprise Linux 6
postfix-2:2.6.6-2.2.el6_1
Fixed · RHSA-2011:0843
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | postfix-2:2.2.10-1.5.el4 | Fixed | RHSA-2011:0843 |
| Red Hat Enterprise Linux 5 | postfix-2:2.3.3-2.3.el5_6 | Fixed | RHSA-2011:0843 |
| Red Hat Enterprise Linux 6 | postfix-2:2.6.6-2.2.el6_1 | Fixed | RHSA-2011:0843 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 21.48% (0.21481) | 97.55th | v5 (v2026.06.15) |
| Jun 15, 2026 | 21.65% (0.21646) | 97.31th | v5 (v2026.06.15) |
| Jun 13, 2026 | 47.11% (0.47114) | 97.76th | v4 (v2025.03.14) |
| May 11, 2026 | 45.15% (0.45154) | 97.62th | v4 (v2025.03.14) |
| Apr 29, 2026 | 41.82% (0.41824) | 97.44th | v4 (v2025.03.14) |
| Jan 18, 2026 | 32.66% (0.32656) | 96.73th | v4 (v2025.03.14) |
| Oct 3, 2025 | 58.26% (0.58262) | 98.14th | v4 (v2025.03.14) |
| Oct 1, 2025 | 46.41% (0.46410) | 97.59th | v4 (v2025.03.14) |
| Sep 28, 2025 | 62.10% (0.62103) | 98.31th | v4 (v2025.03.14) |
| Aug 29, 2025 | 67.16% (0.67165) | 98.50th | v4 (v2025.03.14) |
| Aug 17, 2025 | 64.54% (0.64537) | 98.37th | v4 (v2025.03.14) |
| Jul 30, 2025 | 62.79% (0.62793) | 98.29th | v4 (v2025.03.14) |
| Mar 30, 2025 | 66.37% (0.66374) | 98.40th | v4 (v2025.03.14) |
| Mar 29, 2025 | 53.49% (0.53486) | 97.06th | v4 (v2025.03.14) |
| Mar 28, 2025 | 66.37% (0.66374) | 98.40th | v4 (v2025.03.14) |
| Mar 27, 2025 | 53.49% (0.53486) | 97.63th | v4 (v2025.03.14) |
| Mar 20, 2025 | 63.70% (0.63697) | 98.30th | v4 (v2025.03.14) |
| Mar 19, 2025 | 53.49% (0.53486) | 97.67th | v4 (v2025.03.14) |
| Mar 17, 2025 | 66.37% (0.66374) | 98.39th | v4 (v2025.03.14) |
| Jan 3, 2025 | 88.87% (0.88867) | 98.98th | v3 (v2023.03.01) |
| Dec 17, 2024 | 85.17% (0.85174) | 98.75th | v3 (v2023.03.01) |
| Feb 20, 2024 | 88.66% (0.88659) | 98.59th | v3 (v2023.03.01) |
| Jan 1, 2024 | 86.75% (0.86754) | 98.33th | v3 (v2023.03.01) |
| Nov 11, 2023 | 88.66% (0.88659) | 98.40th | v3 (v2023.03.01) |
| Nov 8, 2023 | 90.56% (0.90564) | 98.51th | v3 (v2023.03.01) |
| Mar 7, 2023 | 92.05% (0.92053) | 98.35th | v3 (v2023.03.01) |
| Mar 6, 2023 | 41.86% (0.41856) | 98.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 41.86% (0.41856) | 97.55th | v2 (v2022.01.01) |
References (21)
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705 x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00002.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/44500 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://security.gentoo.org/glsa/glsa-201206-33.xml vendor-advisoryx_refsource_GENTOO
- http://securityreason.com/securityalert/8247 third-party-advisoryx_refsource_SREASON
- http://www.debian.org/security/2011/dsa-2233 vendor-advisoryx_refsource_DEBIAN
- http://www.kb.cert.org/vuls/id/727230 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.mail-archive.com/postfix-announce%40postfix.org/msg00007.html mailing-listx_refsource_MLIST
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:090 vendor-advisoryx_refsource_MANDRIVA
- http://www.osvdb.org/72259 vdb-entryx_refsource_OSVDB
- http://www.postfix.org/CVE-2011-1720.html x_refsource_CONFIRMVendor Advisory
- http://www.postfix.org/announcements/postfix-2.8.3.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/archive/1/517917/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/47778 vdb-entryx_refsource_BIDPatch
- http://www.securitytracker.com/id?1025521 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/usn-1131-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2011-1720 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=699035 x_refsource_CONFIRMIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67359 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-1720
- https://www.cve.org/CVERecord?id=CVE-2011-1720
Change history (0)
No recorded changes yet.