Bug 2449948 (CVE-2019-25544) - CVE-2019-25544 Pidgin: Pidgin: Denial of Service via excessively long username
Summary: CVE-2019-25544 Pidgin: Pidgin: Denial of Service via excessively long username
Keywords:
Status: NEW
Alias: CVE-2019-25544
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2450324 2450325
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-21 13:01 UTC by OSIDB Bzimport
Modified: 2026-04-01 11:29 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-03-21 13:01:43 UTC 
Pidgin 2.13.0 contains a denial of service vulnerability that allows local attackers to crash the application by providing an excessively long username string during account creation. Attackers can input a buffer of 1000 characters in the username field and trigger a crash when joining a chat, causing the application to become unavailable.
Comment 2 Jaroslav Škarvada 2026-04-01 10:51:59 UTC 
Isn't it for pidgin <= 2.13.0? IMHO there is everywhere (fedora-42 - 45, EPEL-9) pidgin-2.14.
Comment 3 Jaroslav Škarvada 2026-04-01 11:21:32 UTC 
IMHO pidgin <= 2.13.0 is in RHEL-7, RHEL-8
Comment 4 Jaroslav Škarvada 2026-04-01 11:29:30 UTC 
I wasn't able to reproduce with pidgin-2.14.4, nor with pidgin-2.10.11-9.el7. I tried with the Bonjour protocol. Could you provide correct reproducer?
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