Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsedforwarding on" are vulnerable. Configurations with "collapsedforwarding off" or without a "collapsedforwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsedforwarding lines from their squid.conf.
{
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{
"binary_version": "3.5.12-1ubuntu7.16+esm5",
"binary_name": "squid-cgi"
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{
"binary_version": "3.5.12-1ubuntu7.16+esm5",
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{
"binary_version": "3.5.12-1ubuntu7.16+esm5",
"binary_name": "squid-purge"
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{
"binary_version": "3.5.12-1ubuntu7.16+esm5",
"binary_name": "squid3"
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{
"binary_version": "3.5.12-1ubuntu7.16+esm5",
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{
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{
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"binary_name": "squid"
},
{
"binary_version": "3.5.27-1ubuntu1.14+esm4",
"binary_name": "squid-cgi"
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{
"binary_version": "3.5.27-1ubuntu1.14+esm4",
"binary_name": "squid-common"
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"binary_name": "squid-purge"
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"binary_name": "squid3"
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{
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"binary_name": "squid-common"
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"binary_name": "squid-purge"
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{
"binary_version": "4.10-1ubuntu1.12",
"binary_name": "squidclient"
}
],
"availability": "No subscription required"
}
{
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{
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"binary_name": "squid"
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{
"binary_version": "5.7-0ubuntu0.22.04.4",
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"binary_name": "squid-common"
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{
"binary_version": "5.7-0ubuntu0.22.04.4",
"binary_name": "squidclient"
}
],
"availability": "No subscription required"
}