In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, modauthnzldap, if configured with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding when verifying the user's credentials. If the header value is not present in the charset conversion table, a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example, 'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the process would crash which could be used as a Denial of Service attack. In the more likely case, this memory is already reserved for future use and the issue has no effect at all.
{
"unresolved_ranges": [
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*",
"extracted_events": [
{
"last_affected": "12.04"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"extracted_events": [
{
"last_affected": "14.04"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"extracted_events": [
{
"last_affected": "16.04"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "17.10"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"extracted_events": [
{
"last_affected": "18.04"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "7.0"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "8.0"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "9.0"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "6.0"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "7.0"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "7.4"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "7.5"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "7.6"
}
]
}
]
}{
"source": "CPE_FIELD",
"cpe": [
"cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.4:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.12:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.16:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.17:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.18:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.23:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.25:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.26:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.27:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.28:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:http_server:2.4.29:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "2.4.1"
},
{
"last_affected": "2.4.2"
},
{
"last_affected": "2.4.3"
},
{
"last_affected": "2.4.4"
},
{
"last_affected": "2.4.6"
},
{
"last_affected": "2.4.7"
},
{
"last_affected": "2.4.9"
},
{
"last_affected": "2.4.10"
},
{
"last_affected": "2.4.12"
},
{
"last_affected": "2.4.16"
},
{
"last_affected": "2.4.17"
},
{
"last_affected": "2.4.18"
},
{
"last_affected": "2.4.20"
},
{
"last_affected": "2.4.23"
},
{
"last_affected": "2.4.25"
},
{
"last_affected": "2.4.26"
},
{
"last_affected": "2.4.27"
},
{
"last_affected": "2.4.28"
},
{
"last_affected": "2.4.29"
}
]
}