Multiple integer overflows in the msn_slplink_process_msg functions in the MSN protocol handler in (1) libpurple/protocols/msn/slplink.c and
Multiple integer overflows in the msn_slplink_process_msg functions in the MSN protocol handler in (1) libpurple/protocols/msn/slplink.c and (2) libpurple/protocols/msnp9/slplink.c in Pidgin (formerly Gaim) before 2.5.6 on 32-bit platforms allow remote attackers to execute arbitrary code via a malformed SLP message with a crafted offset value, leading to buffer overflows. NOTE: this issue exists because of an incomplete fix for CVE-2008-2927.
Noroxi analysis
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We use this product, ask for help- Published
- May 26, 2009
- Updated
- Jun 16, 2026
- EPSS
- 13.3% · 96th percentile
- CWE
- CWE-189
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Report tools
Action score
41
Plan
Add it to your regular patch cycle.
- CVSS
- 37 / 40 · 9.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 4 / 30 · 13.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| pidgin | pidgin | cpe:2.3:a:pidgin:pidgin |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- pidgin pidginup to 2.5.5 inclusive
- pidgin pidgin2.4.0
- pidgin pidgin2.4.1
- pidgin pidgin2.4.2
- pidgin pidgin2.4.3
- pidgin pidgin2.5.0
- pidgin pidgin2.5.2
- pidgin pidgin2.5.3
- pidgin pidgin2.5.4
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | pidgin | before 2.5.6-1 | 2.5.6-1 |
| Debian:5.0 | pidgin | before 2.4.3-4lenny2 | 2.4.3-4lenny2 |
| Red Hat:enterprise_linux:3::as | pidgin | before 0:1.5.1-3.el3 | 0:1.5.1-3.el3 |
| Red Hat:enterprise_linux:3::as | pidgin-debuginfo | before 0:1.5.1-3.el3 | 0:1.5.1-3.el3 |
| Red Hat:enterprise_linux:4::as | finch | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | finch-devel | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | libpurple | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | libpurple-devel | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | libpurple-perl | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | libpurple-tcl | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | pidgin | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | pidgin-debuginfo | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | pidgin-devel | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:4::as | pidgin-perl | before 0:2.5.5-2.el4 | 0:2.5.5-2.el4 |
| Red Hat:enterprise_linux:5::client | finch | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client | libpurple | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client | libpurple-perl | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client | libpurple-tcl | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client | pidgin-perl | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client_workstation | finch-devel | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client_workstation | libpurple-devel | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client_workstation | pidgin | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client_workstation | pidgin-debuginfo | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
| Red Hat:enterprise_linux:5::client_workstation | pidgin-devel | before 0:2.5.5-3.el5 | 0:2.5.5-3.el5 |
Same product
pidgin: all recordsOther highest-scoring records for the same primary product.
- CVE-2009-2694The msn_slplink_process_msg function in libpurple/protocols/msn/slplink.c in libpurple, as used in Pidgin (formerly Gaim) before 2.5.9 and A46Plan
- CVE-2013-6490The SIMPLE protocol functionality in Pidgin before 2.10.8 allows remote attackers to have an unspecified impact via a negative Content-Lengt44Plan
- CVE-2017-2640An out-of-bounds write flaw was found in the way Pidgin before 2.12.0 processed XML content.41Plan
- CVE-2016-1000030Pidgin version <2.11.0 contains a vulnerability in X.509 Certificates imports specifically due to improper check of return values from gnutl40Plan
- CVE-2013-6486gtkutils.c in Pidgin before 2.10.8 on Windows allows user-assisted remote attackers to execute arbitrary programs via a message containing a38Monitor
- CVE-2011-3185gtkutils.c in Pidgin before 2.10.0 on Windows allows user-assisted remote attackers to execute arbitrary programs via a file: URL in a messa38Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:pidgin | 2.5.6-1 · Debian:12 | Package registry (OSV) |
| red hat:finch | 0:2.5.5-2.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:finch-devel | 0:2.5.5-2.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpurple | 0:2.5.5-2.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpurple-devel | 0:2.5.5-2.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpurple-perl | 0:2.5.5-2.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpurple-tcl | 0:2.5.5-2.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:pidgin | 0:1.5.1-3.el3 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:pidgin-debuginfo | 0:1.5.1-3.el3 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:pidgin-devel | 0:2.5.5-2.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:pidgin-perl | 0:2.5.5-2.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2009-09-09 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+106 d
- TodaySep 30, 2026+6336 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
CWE-189 · Numeric ErrorsCVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- debian.org/security/2009/dsa-1805
- secunia.com/advisories/35188
- secunia.com/advisories/35194
- secunia.com/advisories/35202
- secunia.com/advisories/35215
- secunia.com/advisories/35294
- secunia.com/advisories/35329
- secunia.com/advisories/35330
- secunia.com/advisories/37071
- www.gentoo.org/security/en/glsa/glsa-200905-07.xml
- www.mandriva.com/security/advisories?name=MDVSA-2009:140
- www.mandriva.com/security/advisories?name=MDVSA-2009:173
- www.pidgin.im/news/security/?id=32
- www.redhat.com/support/errata/RHSA-2009-1059.html
- www.redhat.com/support/errata/RHSA-2009-1060.html
- www.securityfocus.com/bid/35067
- www.ubuntu.com/usn/USN-781-1
- www.ubuntu.com/usn/USN-781-2
- www.vupen.com/english/advisories/2009/1396
- bugzilla.redhat.com/show_bug.cgi?id=500493
Vendor advisories and official records. Exploit/PoC links are deliberately left out.