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CVE-2011-1929

19
FAUCET Score

CVE-2011-1929 describes a denial-of-service vulnerability in Dovecot versions 1.2.x before 1.2.17 and 2.0.x before 2.0.13. This flaw, residing in the lib-mail/message-header-parser.c component, allows remote attackers to crash the daemon or corrupt mailboxes by sending a specially crafted email containing null characters in header names. With a CVSS score of 5.0, this vulnerability is of medium severity, requiring no authentication and having low attack complexity, but only impacting availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.2.0CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:1.2.0:*:*:*:*:*:*:*
1.2.1CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:1.2.1:*:*:*:*:*:*:*
1.2.2CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:1.2.2:*:*:*:*:*:*:*
1.2.3CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:1.2.3:*:*:*:*:*:*:*
1.2.4CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:1.2.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.25%
Probability of exploitation in next 30 days
EPSS Percentile
87.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0325 is in the 82nd percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: dovecot-0:0.99.11-10.EL4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: dovecot-0:1.0.7-7.el5_7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: dovecot-1:2.0.9-2.el6_1.1
View patch

Vendor Advisories (1)

redhatCVE-2011-1929Moderate

dovecot: potential crash when parsing header names that contain NUL characters

May 11, 2011

References

dovecot.org / pipermail/dovecot/2011-May/059085.html
Patch
dovecot.org / pipermail/dovecot/2011-May/059086.html
Patch
hg.dovecot.org / dovecot-1.1/rev/3698dfe0f21c
Patch
lists.fedoraproject.org / pipermail/package-announce/2011-June/061384.html
lists.fedoraproject.org / pipermail/package-announce/2011-May/060815.html
lists.fedoraproject.org / pipermail/package-announce/2011-May/060825.html
openwall.com / lists/oss-security/2011/05/18/4
Patch
openwall.com / lists/oss-security/2011/05/19/3
Patch
openwall.com / lists/oss-security/2011/05/19/6
Patch
osvdb.org / 72495
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/44683
secunia.com / advisories/44712
secunia.com / advisories/44756
secunia.com / advisories/44771
secunia.com / advisories/44827
exchange.xforce.ibmcloud.com / vulnerabilities/67589
hermes.opensuse.org / messages/8581790
debian.org / security/2011/dsa-2252
dovecot.org / doc/NEWS-1.2
dovecot.org / doc/NEWS-2.0
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2011-1187.html
securityfocus.com / bid/47930
ubuntu.com / usn/USN-1143-1