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CVE-2009-1374

18
FAUCET Score

CVE-2009-1374 describes a buffer overflow vulnerability in Pidgin (formerly Gaim) versions prior to 2.5.6, specifically within the decrypt_out function. This flaw allows remote attackers to trigger a denial of service (application crash) by sending a specially crafted QQ packet. With a CVSS score of 5.0, this vulnerability is of medium severity, requiring no authentication or complex attack vectors, and its primary impact is limited to application availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.5.5CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.0.0:*:*:*:*:*:*:*
2.0.1CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.0.2:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.0.2:*:linux:*:*:*:*:*

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
2.54%
Probability of exploitation in next 30 days
EPSS Percentile
83.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0254 is in the 75th percentile among its peer group of 23,723 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 (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: pidgin-0:2.5.5-2.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: pidgin-0:2.5.5-3.el5
View patch

Vendor Advisories (1)

redhatCVE-2009-1374Low

pidgin DoS when decrypting qq packets

May 3, 2009

References

bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/35188
secunia.com / advisories/35194
Vendor Advisory
secunia.com / advisories/35202
Vendor Advisory
secunia.com / advisories/35294
secunia.com / advisories/35329
exchange.xforce.ibmcloud.com / vulnerabilities/50684
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11654
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18201
redhat.com / archives/fedora-package-announce/2009-June/msg00033.html
redhat.com / archives/fedora-package-announce/2009-June/msg00051.html
redhat.com / archives/fedora-package-announce/2009-June/msg00075.html
gentoo.org / security/en/glsa/glsa-200905-07.xml
mandriva.com / security/advisories
pidgin.im / news/security
PatchVendor Advisory
redhat.com / support/errata/RHSA-2009-1060.html
securityfocus.com / bid/35067
Patch
ubuntu.com / usn/USN-781-1
vupen.com / english/advisories/2009/1396