libpurple: invalid UTF-8 string handling in SILC messages
Published Nov 4, 2011
4.3
MEDIUMCVSS 2.0
EPSS 3.19%
Description
The g_markup_escape_text function in the SILC protocol plug-in in libpurple 2.10.0 and earlier, as used in Pidgin and possibly other products, allows remote attackers to cause a denial of service (crash) via invalid UTF-8 sequences that trigger use of invalid pointers and an out-of-bounds read, related to interactions with certain versions of glib2.
Affected products
No data.
- ≤ 2.10.0
- 1.0
- 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
- 2.7.0
- 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
- n/a
No data.
Red Hat Enterprise Linux 4
pidgin-0:2.6.6-7.el4
Fixed · RHSA-2011:1371
Red Hat Enterprise Linux 5
pidgin-0:2.6.6-5.el5_7.1
Fixed · RHSA-2011:1371
Red Hat Enterprise Linux 6
pidgin
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | pidgin-0:2.6.6-7.el4 | Fixed | RHSA-2011:1371 |
| Red Hat Enterprise Linux 5 | pidgin-0:2.6.6-5.el5_7.1 | Fixed | RHSA-2011:1371 |
| 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:M/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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.19% (0.03194) | 87.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.31% (0.03314) | 86.94th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.96% (0.00959) | 74.42th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.88% (0.02880) | 77.16th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.96% (0.00959) | 74.90th | v4 (v2025.03.14) |
| Dec 17, 2024 | 8.27% (0.08266) | 94.37th | v3 (v2023.03.01) |
| Nov 23, 2023 | 5.80% (0.05800) | 92.58th | v3 (v2023.03.01) |
| Apr 1, 2023 | 5.72% (0.05717) | 92.12th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.96% (0.05961) | 92.29th | 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 (11)
- http://developer.pidgin.im/ticket/14636 x_refsource_CONFIRMExploit
- http://developer.pidgin.im/viewmtn/revision/diff/be5e66abad2af29604bc794cc4c6600ab12751f3/with/7eb1f6d56cc58bbb5b56b7df53955d36b9b419b8 x_refsource_MISC
- http://pidgin.im/news/security/?id=56 x_refsource_CONFIRM
- http://secunia.com/advisories/46376 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:183 vendor-advisoryx_refsource_MANDRIVA
- http://www.redhat.com/support/errata/RHSA-2011-1371.html vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2011-3594 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=743481 x_refsource_MISCIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-3594
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18034 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2011-3594
| Link | Providers | Tags |
|---|---|---|
| http://developer.pidgin.im/ticket/14636 | x_refsource_CONFIRMExploit | |
| http://developer.pidgin.im/viewmtn/revision/diff/be5e66abad2af29604bc794cc4c6600ab12751f3/with/7eb1f6d56cc58bbb5b56b7df53955d36b9b419b8 | x_refsource_MISC | |
| http://pidgin.im/news/security/?id=56 | x_refsource_CONFIRM | |
| http://secunia.com/advisories/46376 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://www.mandriva.com/security/advisories?name=MDVSA-2011:183 | vendor-advisoryx_refsource_MANDRIVA | |
| http://www.redhat.com/support/errata/RHSA-2011-1371.html | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2011-3594 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=743481 | x_refsource_MISCIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-3594 | ||
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18034 | vdb-entrysignaturex_refsource_OVAL | |
| https://www.cve.org/CVERecord?id=CVE-2011-3594 |
Change history (0)
No recorded changes yet.