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CVE-2010-1167

18
FAUCET Score

CVE-2010-1167 describes a denial-of-service vulnerability affecting fetchmail versions 4.6.3 through 6.3.16 when debug mode is enabled. Remote attackers can exploit this by sending crafted message headers or POP3 UIDL lists containing invalid characters in a multi-character locale, leading to excessive memory consumption and application crashes. This vulnerability has a CVSS score of 4.3 (medium severity) with a low attack complexity and potential for partial availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.3.9CPE matchmatch criteria
cpe:2.3:a:fetchmail:fetchmail:*:rc2:*:*:*:*:*:*
4.6.3CPE matchmatch criteria
cpe:2.3:a:fetchmail:fetchmail:4.6.3:*:*:*:*:*:*:*
4.6.4CPE matchmatch criteria
cpe:2.3:a:fetchmail:fetchmail:4.6.4:*:*:*:*:*:*:*
4.6.5CPE matchmatch criteria
cpe:2.3:a:fetchmail:fetchmail:4.6.5:*:*:*:*:*:*:*
4.6.6CPE matchmatch criteria
cpe:2.3:a:fetchmail:fetchmail:4.6.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.20%
Probability of exploitation in next 30 days
EPSS Percentile
80.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0220 is in the 68th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: fetchmail
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: fetchmail

Vendor Advisories (1)

redhatCVE-2010-1167Low

fetchmail: denial of service in debug mode with multichar locales

Apr 18, 2010

References

developer.berlios.de / project/shownotes.php
fetchmail.info / fetchmail-SA-2010-02.txt
Patch
mandriva.com / security/advisories
securityfocus.com / archive/1/511140/100/0/threaded
securityfocus.com / bid/39556