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Vulnerability record · CVE-2013-5959 · published 28 September 2013

CVE-2013-5959: Bluecoat proxysgos memory buffer overflow vulnerability

Bluecoat · Proxysgos

Blue Coat ProxySG before 6.2.14.1, 6.3.x, 6.4.x, and 6.5 before 6.5.2 allows remote attackers to cause a denial of service (memory consumption and dropped connections) via a recursive href in an HTML page, which triggers a large number of HTTP RW pipeline pre-fetch requests.

7.1 CVSS 2.0 High EPSS 1.5% · top 26.0% CWE-119 · Memory buffer overflow
7.1CVSS 2.0 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

Blue Coat ProxySG before 6.2.14.1, 6.3.x, 6.4.x, and 6.5 before 6.5.2 allows remote attackers to cause a denial of service (memory consumption and dropped connections) via a recursive href in an HTML page, which triggers a large number of HTTP RW pipeline pre-fetch requests.

AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://osvdb.org/97767
http://secunia.com/advisories/54991 Vendor Advisory
http://www.securitytracker.com/id/1029088
https://kb.bluecoat.com/index?page=content&id=SA75 Vendor Advisory
http://osvdb.org/97767
http://secunia.com/advisories/54991 Vendor Advisory
http://www.securitytracker.com/id/1029088
https://kb.bluecoat.com/index?page=content&id=SA75 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2011-5124Blue Coat ProxySG BCAAA stack buffer overflow via sync portThe BCAAA component used by Blue Coat ProxySG 4.2.3 through 6.1 and ProxyOne contains a stack-based buffer overflow that is triggered by a large pack…EPSS 55%analysed9.3CVE-2010-5189Bluecoat sgos permissions and access controls vulnerabilityBlue Coat ProxySG before SGOS 4.3.4.1, 5.x before SGOS 5.4.5.1, 5.5 before SGOS 5.5.4.1, and 6.x before SGOS 6.1.1.1 allows remote authenticated user…EPSS 1.8%7.9CVE-2014-2033Bluecoat proxysgos permissions and access controls vulnerabilityThe caching feature in SGOS in Blue Coat ProxySG 5.5 through 5.5.11.3, 6.1 through 6.1.6.3, 6.2 through 6.2.15.3, 6.4 through 6.4.6.1, and 6.3 and 6.…EPSS 1.0%7.5CVE-2016-6594Bluecoat advanced secure gateway vulnerabilityBlue Coat Advanced Secure Gateway 6.6, CacheFlow 3.4, ProxySG 6.5 and 6.6 allows remote attackers to bypass blocked requests, user authentication, an…EPSS 1.3%7.5CVE-2004-0079Cisco firewall services module null pointer dereference vulnerabilityThe do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause a denial of service (crash) vi…EPSS 9.5%7.4CVE-2015-8597Bluecoat proxysg vulnerabilityOpen redirect vulnerability in Blue Coat ProxySG 6.5 before 6.5.8.8 and 6.6 and Advanced Secure Gateway (ASG) 6.6 might allow remote attackers to red…EPSS 1.9%5.8CVE-2009-1211Bluecoat proxysg va-10 vulnerabilityBlue Coat ProxySG, when transparent interception mode is enabled, uses the HTTP Host header to determine the remote endpoint, which allows remote att…EPSS 1.4%5.0CVE-2010-5190Bluecoat sgos permissions and access controls vulnerabilityThe Active Content Transformation functionality in Blue Coat ProxySG before SGOS 4.3.4.2, 5.x before SGOS 5.4.5.1, 5.5 before SGOS 5.5.4.1, and 6.x b…EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2013-5959), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.