pidgin: SILC remote crash on channel messages
Published Dec 17, 2011
5.0
MEDIUMCVSS 2.0
EPSS 3.60%
Description
The silc_channel_message function in ops.c in the SILC protocol plugin in libpurple in Pidgin before 2.10.1 does not perform the expected UTF-8 validation on message data, which allows remote attackers to cause a denial of service (application crash) via a crafted message, a different vulnerability than CVE-2011-3594.
Affected products
No data.
- ≤ 2.10.0
- 2.0.0
- 2.0.1
- 2.0.2
- 2.1.0
- 2.1.1
- 2.2.0
- 2.2.1
- 2.2.2
- 2.3.0
- 2.3.1
- 2.4.0
- 2.4.1
- 2.4.2
- 2.4.3
- 2.5.0
- 2.5.1
- 2.5.2
- 2.5.3
- 2.5.4
- 2.5.5
- 2.5.6
- 2.5.7
- 2.5.8
- 2.5.9
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
- 2.6.6
- 2.7.1
- 2.7.2
- 2.7.3
- 2.7.4
- 2.7.5
- 2.7.6
- 2.7.7
- 2.7.8
- 2.7.9
- 2.7.10
- 2.7.11
- 2.8.0
- 2.9.0
No data.
Red Hat Enterprise Linux 4
pidgin-0:2.6.6-10.el4
Fixed · RHSA-2011:1820
Red Hat Enterprise Linux 5
pidgin-0:2.6.6-5.el5_7.4
Fixed · RHSA-2011:1820
Red Hat Enterprise Linux 6
pidgin
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | pidgin-0:2.6.6-10.el4 | Fixed | RHSA-2011:1820 |
| Red Hat Enterprise Linux 5 | pidgin-0:2.6.6-5.el5_7.4 | Fixed | RHSA-2011:1820 |
| Red Hat Enterprise Linux 6 | pidgin | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the version of pidgin as shipped with Red Hat Enterprise Linux 6 as it explicitly disables support for the SILC protocol.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.60% (0.03600) | 89.09th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.73% (0.03734) | 88.38th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.17% (0.01165) | 76.69th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.07% (0.03071) | 77.80th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.28% (0.01284) | 78.22th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.91% (0.03906) | 91.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.88% (0.02882) | 89.17th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
References (12)
- http://developer.pidgin.im/viewmtn/revision/diff/c7b95cc3be0590b52edc02d4750ae62844c1acb6/with/afb9ede3de989f217f03d5670cca00e628bd11f1/libpurple/protocols/silc/ops.c x_refsource_CONFIRMPatch
- http://developer.pidgin.im/viewmtn/revision/info/afb9ede3de989f217f03d5670cca00e628bd11f1 x_refsource_CONFIRM
- http://secunia.com/advisories/47234 third-party-advisoryx_refsource_SECUNIA
- http://www.pidgin.im/news/security/?id=59 x_refsource_CONFIRMPatchVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2011-1820.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/bid/51074 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2011-4603 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=766446 Issue Tracking
- https://hermes.opensuse.org/messages/13195955 vendor-advisoryx_refsource_SUSE
- https://nvd.nist.gov/vuln/detail/CVE-2011-4603
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18303 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2011-4603
Change history (0)
No recorded changes yet.