CVE-2021-36386
Published: 30 July 2021
report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic platform results in an impact beyond an inconvenience to the client user.
Notes
| Author | Note |
|---|---|
| mdeslaur | second commit is a regression fix |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
fetchmail Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Needs triage
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Not vulnerable
(6.4.16-5)
|
|
| jammy |
Not vulnerable
(6.4.16-5)
|
|
| kinetic |
Not vulnerable
(6.4.16-5)
|
|
| lunar |
Not vulnerable
(6.4.16-5)
|
|
| mantic |
Not vulnerable
(6.4.16-5)
|
|
| noble |
Not vulnerable
(6.4.16-5)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(6.4.16-4)
|
|
| xenial |
Needs triage
|
|
|
Patches: upstream: https://gitlab.com/fetchmail/fetchmail/-/commit/c546c8299243a10a7b85c638e0e61396ecd5d8b5 upstream: https://gitlab.com/fetchmail/fetchmail/-/commit/d3db2da1d13bd2419370ad96defb92eecb17064c |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |