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7.8
CVE-2006-5974: Fetchmail Crashes When Dealing with Malformed Messages
CVE-2006-5974 · published 19 years ago
Summary
Fetchmail versions 6.3.5 and 6.3.6 can crash if it receives a message that doesn't follow the expected format. This means that an attacker could potentially shut down the fetchmail service on a server, making it unavailable to users. To stay safe, update to the latest version of fetchmail, 6.3.6-rc4 or later.
What to do
- Update debian fetchmail to version 6.3.6-1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Debian:11 | debian | fetchmail |
< 6.3.6-1 Fix: upgrade to 6.3.6-1
|
| Debian:12 | debian | fetchmail |
< 6.3.6-1 Fix: upgrade to 6.3.6-1
|
| Debian:13 | debian | fetchmail |
< 6.3.6-1 Fix: upgrade to 6.3.6-1
|
| Debian:14 | debian | fetchmail |
< 6.3.6-1 Fix: upgrade to 6.3.6-1
|
| – | fetchmail | fetchmail |
6.3.5 6.3.6 cpe:2.3:a:fetchmail:fetchmail:6.3.5:*:*:*:*:*:*:* |
Original advisory text
fetchmail 6.3.5 and 6.3.6 before 6.3.6-rc4, when refusing a message delivered via the mda option, allows remote attackers to cause a denial of service (crash) via unknown vectors that trigger a NUL...
fetchmail 6.3.5 and 6.3.6 before 6.3.6-rc4, when refusing a message delivered via the mda option, allows remote attackers to cause a denial of service (crash) via unknown vectors that trigger a NULL pointer dereference when calling the (1) ferror or (2) fflush functions.
References
- https://security-tracker.debian.org/tracker/CVE-2006-5974 Vendor Advisory
- http://www.trustix.org/errata/2007/0007
- http://fedoranews.org/cms/node/2429
- http://fetchmail.berlios.de/fetchmail-SA-2006-03.txt
- http://osvdb.org/31836
- http://secunia.com/advisories/23631 Vendor Advisory
- http://secunia.com/advisories/23804 Vendor Advisory
- http://secunia.com/advisories/23838 Vendor Advisory
- http://secunia.com/advisories/23923 Vendor Advisory
- http://secunia.com/advisories/24151 Vendor Advisory
- http://security.gentoo.org/glsa/glsa-200701-13.xml
- http://securitytracker.com/id?1017479
- http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware...
- http://www.novell.com/linux/security/advisories/2007_4_sr.html
- http://www.openpkg.com/security/advisories/OpenPKG-SA-2007.004.html
- http://www.securityfocus.com/archive/1/456114/100/0/threaded
- http://www.securityfocus.com/bid/21902 Patch
- http://www.vupen.com/english/advisories/2007/0087
- http://www.vupen.com/english/advisories/2007/0088
Severity
7.8
High
Type
CWE-20Improper Input Validation
Timeline
Published31 Dec 2006
Updated24 Oct 2026
First seen22 Apr 2026
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