USN-7639-2 (UBUNTU-CVE-2024-42516)

Vulnerability from osv_ubuntu – Published: 2025-08-19 10:40 – Updated: 2026-06-25 10:46 – Source website
VLAI
Summary
apache2 vulnerabilities
Details

USN-7639-1 fixed several vulnerabilities in Apache. This update provides the corresponding update for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and addressed a regression fix (LP: #2119395). CVE-2025-49630 and CVE-2025-53020 only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that the Apache HTTP Server incorrectly handled certain Content-Type response headers. A remote attacker could possibly use this issue to perform HTTP response splitting attacks. (CVE-2024-42516)

xiaojunjie discovered that the Apache HTTP Server mod_proxy module incorrectly handled certain requests. A remote attacker could possibly use this issue to send outbound proxy requests to an arbitrary URL. (CVE-2024-43204)

John Runyon discovered that the Apache HTTP Server mod_ssl module incorrectly escaped certain data. A remote attacker could possibly use this issue to insert escape characters into log files. (CVE-2024-47252)

Sven Hebrok, Felix Cramer, Tim Storm, Maximilian Radoy, and Juraj Somorovsky discovered that the Apache HTTP Server mod_ssl module incorrectly handled TLS 1.3 session resumption. A remote attacker could possibly use this issue to bypass access control. (CVE-2025-23048)

Anthony CORSIEZ discovered that the Apache HTTP Server mod_proxy_http2 module incorrectly handled missing host headers. A remote attacker could possibly use this issue to cause the server to crash, resulting in a denial of service. (CVE-2025-49630)

Robert Merget discovered that the Apache HTTP Server mod_ssl module incorrectly handled TLS upgrades. A remote attacker could possibly use this issue to hijack an HTTP session. This update removes the old "SSLEngine optional" configuration option, possibly requiring a configuration change in certain environments. (CVE-2025-49812)

Gal Bar Nahum discovered that the Apache HTTP Server incorrectly handled certain memory operations. A remote attacker could possibly use this issue to cause the server to consume resources, leading to a denial of service. (CVE-2025-53020)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
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              "severity": [
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                  "type": "CVSS_V3"
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                },
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                }
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              "severity": [
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                  "type": "CVSS_V3"
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                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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                  "type": "CVSS_V3"
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                  "type": "Ubuntu"
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              "id": "CVE-2024-47252",
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                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
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            {
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              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-49630",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-49812",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-53020",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
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          ],
          "ecosystem": "Ubuntu:Pro:20.04:LTS"
        }
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  ],
  "aliases": [],
  "details": "USN-7639-1 fixed several vulnerabilities in Apache. This update\nprovides the corresponding update for Ubuntu 16.04 LTS, Ubuntu\n18.04 LTS, Ubuntu 20.04 LTS, and addressed a regression\nfix (LP: #2119395). CVE-2025-49630 and CVE-2025-53020 only\naffected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that the Apache HTTP Server incorrectly handled\n certain Content-Type response headers. A remote attacker could\n possibly use this issue to perform HTTP response splitting attacks.\n (CVE-2024-42516)\n\n xiaojunjie discovered that the Apache HTTP Server mod_proxy module\n incorrectly handled certain requests. A remote attacker could\n possibly use this issue to send outbound proxy requests to an\n arbitrary URL. (CVE-2024-43204)\n\n John Runyon discovered that the Apache HTTP Server mod_ssl module\n incorrectly escaped certain data. A remote attacker could possibly\n use this issue to insert escape characters into log files.\n (CVE-2024-47252)\n\n Sven Hebrok, Felix Cramer, Tim Storm, Maximilian Radoy, and Juraj\n Somorovsky discovered that the Apache HTTP Server mod_ssl module\n incorrectly handled TLS 1.3 session resumption. A remote attacker\n could possibly use this issue to bypass access control. (CVE-2025-23048)\n\n Anthony CORSIEZ discovered that the Apache HTTP Server mod_proxy_http2\n module incorrectly handled missing host headers. A remote attacker\n could possibly use this issue to cause the server to crash, resulting\n in a denial of service. (CVE-2025-49630)\n\n Robert Merget discovered that the Apache HTTP Server mod_ssl module\n incorrectly handled TLS upgrades. A remote attacker could possibly\n use this issue to hijack an HTTP session. This update removes the\n old \"SSLEngine optional\" configuration option, possibly requiring\n a configuration change in certain environments. (CVE-2025-49812)\n\n Gal Bar Nahum discovered that the Apache HTTP Server incorrectly\n handled certain memory operations. A remote attacker could possibly\n use this issue to cause the server to consume resources, leading\n to a denial of service. (CVE-2025-53020)\n",
  "id": "USN-7639-2",
  "modified": "2026-06-25T10:46:53Z",
  "published": "2025-08-19T10:40:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7639-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-42516"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-43204"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-47252"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-23048"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-49630"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-49812"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-53020"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/2119395"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "apache2 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2024-42516",
    "UBUNTU-CVE-2024-43204",
    "UBUNTU-CVE-2024-47252",
    "UBUNTU-CVE-2025-23048",
    "UBUNTU-CVE-2025-49630",
    "UBUNTU-CVE-2025-49812",
    "UBUNTU-CVE-2025-53020"
  ]
}



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