cyrus-sasl: sasl_encode64() does not reliably null-terminate its output
Published May 15, 2009
7.5
HIGHCVSS 2.0
EPSS 8.21%
Description
Multiple buffer overflows in the CMU Cyrus SASL library before 2.1.23 might allow remote attackers to execute arbitrary code or cause a denial of service (application crash) via strings that are used as input to the sasl_encode64 function in lib/saslutil.c.
Affected products
No data.
- ≤ 2.1.22
- 1.4.1
- 1.5.0
- 1.5.2
- 1.5.3
- 1.5.5
- 1.5.10
- 1.5.11
- 1.5.13
- 1.5.15
- 1.5.16
- 1.5.20
- 1.5.21
- 1.5.22
- 1.5.23
- 1.5.24
- 1.5.26
- 1.5.27
- 1.5.28
- 2.0.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.0.4
- 2.0.5
- 2.1.0
- 2.1.1
- 2.1.2
- 2.1.3
- 2.1.5
- 2.1.6
- 2.1.7
- 2.1.8
- 2.1.9
- 2.1.10
- 2.1.11
- 2.1.12
- 2.1.13
- 2.1.14
- 2.1.15
- 2.1.16
- 2.1.17
- 2.1.18
- 2.1.19
- 2.1.20
- 2.1.21
No data.
Red Hat Enterprise Linux 4
cyrus-imapd-0:2.2.12-10.el4_8.1
Fixed · RHSA-2009:1116
Red Hat Enterprise Linux 5
cyrus-imapd-0:2.3.7-2.el5_3.2
Fixed · RHSA-2009:1116
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | cyrus-imapd-0:2.2.12-10.el4_8.1 | Fixed | RHSA-2009:1116 |
| Red Hat Enterprise Linux 5 | cyrus-imapd-0:2.3.7-2.el5_3.2 | Fixed | RHSA-2009:1116 |
No package ranges for this CVE.
Remediation
Red Hat statement
The upstream fix for this issue is not backwards compatible and introduces an ABI change not allowed in Red Hat Enterprise Linux. Therefore, there is no plan to address this problem directly in cyrus-sasl packages. All applications shipped in Red Hat Enterprise Linux and using affected sasl_encode64() function were investigated and patched if their use of the function could have security consequences. See following bug report for further details: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-0688#c20
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:L/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 (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 8.21% (0.08206) | 94.71th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.21% (0.08206) | 94.14th | v5 (v2026.06.15) |
| Jan 28, 2026 | 39.48% (0.39477) | 97.19th | v4 (v2025.03.14) |
| Dec 1, 2025 | 33.35% (0.33352) | 96.76th | v4 (v2025.03.14) |
| Mar 30, 2025 | 31.36% (0.31361) | 96.39th | v4 (v2025.03.14) |
| Mar 29, 2025 | 49.58% (0.49577) | 96.79th | v4 (v2025.03.14) |
| Mar 17, 2025 | 31.36% (0.31361) | 96.38th | v4 (v2025.03.14) |
| Dec 17, 2024 | 42.83% (0.42829) | 97.39th | v3 (v2023.03.01) |
| Oct 18, 2024 | 39.39% (0.39388) | 97.32th | v3 (v2023.03.01) |
| Dec 24, 2023 | 40.67% (0.40674) | 96.95th | v3 (v2023.03.01) |
| Nov 13, 2023 | 33.22% (0.33224) | 96.60th | v3 (v2023.03.01) |
| Aug 18, 2023 | 26.42% (0.26423) | 96.14th | v3 (v2023.03.01) |
| Mar 7, 2023 | 24.78% (0.24782) | 95.87th | v3 (v2023.03.01) |
| Mar 6, 2023 | 8.23% (0.08228) | 93.49th | v2 (v2022.01.01) |
| Apr 1, 2022 | 8.23% (0.08228) | 92.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.23% (0.08228) | 82.23th | v2 (v2022.01.01) |
References (43)
- ftp://ftp.andrew.cmu.edu/pub/cyrus-mail/cyrus-sasl-2.1.23.tar.gz x_refsource_CONFIRMPatch
- http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html vendor-advisoryx_refsource_APPLE
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html vendor-advisoryx_refsource_SUSE
- http://osvdb.org/54514 vdb-entryx_refsource_OSVDB
- http://osvdb.org/54515 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/35094 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/35097 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/35102 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/35206 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/35239 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/35321 third-party-advisoryx_refsource_SECUNIA
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- http://secunia.com/advisories/35746 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/39428 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-200907-09.xml vendor-advisoryx_refsource_GENTOO
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- http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021699.1-1 vendor-advisoryx_refsource_SUNALERT
- http://support.apple.com/kb/HT4077 x_refsource_CONFIRM
- http://support.avaya.com/elmodocs2/security/ASA-2009-184.htm x_refsource_CONFIRM
- http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0091 x_refsource_CONFIRM
- http://www.debian.org/security/2009/dsa-1807 vendor-advisoryx_refsource_DEBIAN
- http://www.kb.cert.org/vuls/id/238019 third-party-advisoryx_refsource_CERT-VNPatchUS Government Resource
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- http://www.oracle.com/technetwork/topics/security/cpuapr2010-099504.html x_refsource_CONFIRM
- http://www.redhat.com/support/errata/RHSA-2009-1116.html vendor-advisoryx_refsource_REDHAT
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- http://www.securitytracker.com/id?1022231 vdb-entryx_refsource_SECTRACK
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- http://www.us-cert.gov/cas/techalerts/TA10-103B.html third-party-advisoryx_refsource_CERTUS Government Resource
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- http://www.vupen.com/english/advisories/2009/2012 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2009-0688 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=487251 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/50554 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2009-0688
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10687 vdb-entrysignaturex_refsource_OVAL
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6136 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2009-0688
Change history (0)
No recorded changes yet.