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Fencer Vulns
high 7.5

CVE-2009-0688 json

Multiple buffer overflows in the CMU Cyrus SASL library before 2.1.23 might allow remote attackers to execute arbitrary code or cause a den…

published 2009-05-15 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-0688

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.2%
EPSS 8.2% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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.

Patch / fix

  • cyrus-sasl2 Debian 14, Debian 13, Debian 12 2.1.23.dfsg1-1

debian advisories DEBIAN-CVE-2009-0688

  • cyrus-imapd RHEL 4 2.2.12-10.el4_8.1
  • cyrus-imapd RHEL 5 2.3.7-2.el5_3.2
  • perl-Cyrus RHEL 4 2.2.12-10.el4_8.1
  • cyrus-imapd-nntp RHEL 4 2.2.12-10.el4_8.1
  • cyrus-imapd-perl RHEL 5 2.3.7-2.el5_3.2
  • cyrus-imapd-utils RHEL 4 2.2.12-10.el4_8.1
  • cyrus-imapd-utils RHEL 5 2.3.7-2.el5_3.2
  • cyrus-imapd-murder RHEL 4 2.2.12-10.el4_8.1

red hat advisories RHSA-2009:1116

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-0688 updated cvss 6.4

cyrus-sasl: sasl_encode64() does not reliably null-terminate its output

  • Red Hat Enterprise Linux (v. 5 server) cyrus-imapd 2.3.7-2.el5_3.2, cyrus-imapd-perl 2.3.7-2.el5_3.2, cyrus-imapd-utils 2.3.7-2.el5_3.2 Red Hat Enterprise Linux AS version 4 perl-Cyrus 2.2.12-10.el4_8.1, cyrus-imapd 2.2.12-10.el4_8.1, cyrus-imapd-nntp 2.2.12-10.el4_8.1, cyrus-imapd-utils 2.2.12-10.el4_8.1, cyrus-imapd-murder 2.2.12-10.el4_8.1 Red Hat Enterprise Linux Desktop version 4 perl-Cyrus 2.2.12-10.el4_8.1, cyrus-imapd 2.2.12-10.el4_8.1, cyrus-imapd-nntp 2.2.12-10.el4_8.1, cyrus-imapd-utils 2.2.12-10.el4_8.1, cyrus-imapd-murder 2.2.12-10.el4_8.1 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) cyrus-imapd 2.3.7-2.el5_3.2, cyrus-imapd-perl 2.3.7-2.el5_3.2, cyrus-imapd-utils 2.3.7-2.el5_3.2 Red Hat Enterprise Linux ES version 4 perl-Cyrus 2.2.12-10.el4_8.1, cyrus-imapd 2.2.12-10.el4_8.1, cyrus-imapd-nntp 2.2.12-10.el4_8.1, cyrus-imapd-utils 2.2.12-10.el4_8.1, cyrus-imapd-murder 2.2.12-10.el4_8.1 Red Hat Enterprise Linux WS version 4 perl-Cyrus 2.2.12-10.el4_8.1, cyrus-imapd 2.2.12-10.el4_8.1, cyrus-imapd-nntp 2.2.12-10.el4_8.1, cyrus-imapd-utils 2.2.12-10.el4_8.1, cyrus-imapd-murder 2.2.12-10.el4_8.1
    fixed: vendor fix RHSA-2009:1116

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

8.21% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.