{
    "CVE_data_meta": {
        "ASSIGNER": "security@apache.org",
        "ID": "CVE-2021-26691",
        "STATE": "PUBLIC",
        "TITLE": "Apache HTTP Server mod_session response handling heap overflow"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
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                                "product_name": "Apache HTTP Server",
                                "version": {
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                                            "version_name": "2.4",
                                            "version_value": "2.4.46"
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                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.43"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.41"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.39"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.38"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.37"
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                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.35"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.34"
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                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.33"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.29"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.28"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.27"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.26"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.25"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.23"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.20"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.18"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.17"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.16"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.12"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.10"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.9"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.7"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.6"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.4"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.3"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.2"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.1"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "2.4",
                                            "version_value": "2.4.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Apache Software Foundation"
                }
            ]
        }
    },
    "credit": [
        {
            "lang": "eng",
            "value": "Discovered internally Christophe Jaillet"
        }
    ],
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow"
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.0.9"
    },
    "impact": [
        {
            "other": "low"
        }
    ],
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-122 Heap-based Buffer Overflow"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "url": "http://httpd.apache.org/security/vulnerabilities_24.html",
                "name": "http://httpd.apache.org/security/vulnerabilities_24.html"
            },
            {
                "refsource": "MISC",
                "url": "https://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3E",
                "name": "https://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-announce] 20210609 CVE-2021-26691: mod_session response handling heap overflow",
                "url": "https://lists.apache.org/thread.html/r50cae1b71f1e7421069036b213c26da7d8f47dd59874e3bd956959fe@%3Cannounce.httpd.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[httpd-dev] 20210610 Re: svn commit: r1890598 - in /httpd/site/trunk/content/security/json: CVE-2019-17567.json CVE-2020-13938.json CVE-2020-13950.json CVE-2020-35452.json CVE-2021-26690.json CVE-2021-26691.json CVE-2021-30641.json CVE-2021-31618.json",
                "url": "https://lists.apache.org/thread.html/r7f2b70b621651548f4b6f027552f1dd91705d7111bb5d15cda0a68dd@%3Cdev.httpd.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20210609 CVE-2021-26691: Apache httpd: mod_session response handling heap overflow",
                "url": "http://www.openwall.com/lists/oss-security/2021/06/10/7"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20210709 [SECURITY] [DLA 2706-1] apache2 security update",
                "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00006.html"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4937",
                "url": "https://www.debian.org/security/2021/dsa-4937"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202107-38",
                "url": "https://security.gentoo.org/glsa/202107-38"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-dce7e7738e",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-e3f6dd670d",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/"
            },
            {
                "url": "https://www.oracle.com/security-alerts/cpuoct2021.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/security-alerts/cpuoct2021.html"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20210702-0001/",
                "url": "https://security.netapp.com/advisory/ntap-20210702-0001/"
            },
            {
                "url": "https://www.oracle.com/security-alerts/cpujan2022.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/security-alerts/cpujan2022.html"
            }
        ]
    },
    "source": {
        "discovery": "UNKNOWN"
    }
}