CVE-2021-44790: Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier

Published Dec 20, 2021
·
Updated

A buffer overflow flaw in httpd's lua module could allow an out-of-bounds write. An attacker who is able to submit a crafted request to an httpd instance that is using the lua module may be able to cause an impact to confidentiality, integrity, and/or availability.

Other sources

A carefully crafted request body can cause a buffer overflow in the modlua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.

AMD. A buffer overflow issue was addressed with improved memory handling.

— Apple

AMD. A memory corruption issue was addressed with improved state management.

— Apple

apache. Multiple issues were addressed by updating apache to version 2.4.53.

— Apple

Credit

CVE-2021-44224, CVE-2021-44790, CVE-2022-22719, CVE-2022-22720, CVE-2022-22721, Lockheed Martin Red Team, an anonymous researcher, Jeremy Brown(Trend Micro Zero Day Initiative), Michael DePlante@@izobashi(Trend Micro Zero Day Initiative), Qi Sun(Trend Micro), Ye Zhang@@co0py_Cat(Baidu Security), Robert Ai(Trend Micro), Arsenii Kostromin (0x3c3e), Yonghwi Jin@@jinmo123(Theori), Linus Henze(Pinauten GmbH), Liu Long(Ant Security Light), Jack Dates(RET2 Systems Inc), Antonio Zekic@@antoniozekic, Jeonghoon Shin(Theori working with Trend Micro Zero Day Initiative), Peter Nguyễn Vũ Hoàng@@peternguyen14(STAR Labs), Ned Williamson(Google Project Zero), @@gorelics(BreakPoint), (BreakPoint), Ron Masas(BreakPoint), Wojciech Reguła@@_r3ggi(SecuRing), Arsenii Kostromin (0x3c3e)(Microsoft), Jonathan Bar Or(Microsoft), Zhipeng Huo@@R3dF09(Tencent Security Xuanwu Lab), Yuebin Sun@@yuebinsun2020(Tencent Security Xuanwu Lab), Max Shavrick@@_mxms(the Google Security Team), Zubair Ashraf(Crowdstrike), CVE-2022-0778, CVE-2022-23308, Mickey Jin@@patch1t, @@gorelics, Peter Nguyễn Vũ Hoàng(STAR Labs), Felix Poulin-Belanger, Antonio Cheong Yu Xuan(YCISCQ), CVE-2021-4136, CVE-2021-4166, CVE-2021-4173, CVE-2021-4187, CVE-2021-4192, CVE-2021-4193, CVE-2021-46059, CVE-2022-0128, Heige(KnownSec 404 Team), Bo Qu(Palo Alto Networks), Scarlet Raine, Wang Yu(Cyberserval), CVE-2022-0530, Tavis Ormandy, CVE-2021-45444, ABC Research s.r.o, Jon Thompson(Evolve), IA), actae0n(Blacksun Hackers Club working with Trend Micro Zero Day Initiative), Andrew Williams(Google), Avi Drissman(Google), chenyuwang@@mzzzz__(Tencent Security Xuanwu Lab), Jordy Zomer@@pwningsystems, Paul Walker(Bury), Nathaniel Ekoniak(Ennate Technologies), Gergely Kalman@@gergely_kalman(Mandiant), (Mandiant), Joshua Mason(Mandiant), Ron Waisberg(SecuRing), an anonymous researcher(SecuRing), (Perception Point), Ron Hass@@ronhass7(Perception Point), ryuzaki, Chijin Zhou(ShuiMuYuLin Ltd), Tsinghua wingtecher lab, Jeonghoon Shin(Theori), SorryMybad@@S0rryMybad(Kunlun Lab), Dongzhuo Zhao(ADLab of Venustech)

Affected Software

47 affected componentsFixes available
redhat/httpd<0:2.4.6-97.el7_9.4
0:2.4.6-97.el7_9.4
redhat/httpd<0:2.4.6-45.el7_3.8
0:2.4.6-45.el7_3.8
redhat/httpd<0:2.4.6-67.el7_4.9
0:2.4.6-67.el7_4.9
redhat/httpd<0:2.4.6-89.el7_6.4
0:2.4.6-89.el7_6.4
redhat/httpd<0:2.4.6-90.el7_7.3
0:2.4.6-90.el7_7.3
redhat/httpd24-httpd<0:2.4.34-23.el7.1
0:2.4.34-23.el7.1
debian/apache2
2.4.38-3+deb10u82.4.38-3+deb10u102.4.56-1~deb11u22.4.56-1~deb11u12.4.57-22.4.57-32.4.58-1
Apple macOS Big Sur<11.6.6
11.6.6
Apple Catalina
Apple macOS Monterey<12.4
12.4
Apache HTTP Server<=2.4.51
Fedoraproject Fedora=34
Fedoraproject Fedora=35
Fedoraproject Fedora=36
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Tenable Tenable.Sc>=5.16.0<5.20.0
NetApp Cloud Backup
Oracle Communications Element Manager<=9.0
Oracle Communications Operations Monitor=4.3
Oracle Communications Operations Monitor=4.4
Oracle Communications Operations Monitor=5.0
Oracle Communications Session Report Manager<=9.0
Oracle Communications Session Route Manager<=9.0
Oracle HTTP Server=12.2.1.3.0
Oracle HTTP Server=12.2.1.4.0
Oracle Instantis Enterprisetrack=17.1
Oracle Instantis Enterprisetrack=17.2
Oracle Instantis Enterprisetrack=17.3
Oracle ZFS Storage Appliance Kit=8.8
Apple iOS and macOS=10.15.7-security_update_2020-001
Apple iOS and macOS=10.15.7-security_update_2021-001
Apple iOS and macOS=10.15.7-security_update_2021-002
Apple iOS and macOS=10.15.7-security_update_2021-003
Apple iOS and macOS=10.15.7-security_update_2021-004
Apple iOS and macOS=10.15.7-security_update_2021-005
Apple iOS and macOS=10.15.7-security_update_2021-006
Apple iOS and macOS=10.15.7-security_update_2021-007
Apple iOS and macOS=10.15.7-security_update_2021-008
Apple iOS and macOS=10.15.7-security_update_2022-001
Apple iOS and macOS=10.15.7-security_update_2022-002
Apple iOS and macOS=10.15.7-security_update_2022-003
Apple macOS<10.15.7
Apple macOS>=11.0<11.6.6
Apple macOS>=12.0<12.4
redhat/httpd<2.4.52
2.4.52
Apache HTTP Server<2.4.52

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.6-97.el7_9.4
  2. Upgrade

    Upgrade redhat/httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.6-45.el7_3.8
  3. Upgrade

    Upgrade redhat/httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.6-67.el7_4.9
  4. Upgrade

    Upgrade redhat/httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.6-89.el7_6.4
  5. Upgrade

    Upgrade redhat/httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.6-90.el7_7.3
  6. Upgrade

    Upgrade redhat/httpd24-httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.34-23.el7.1
  7. Upgrade

    Upgrade debian/apache2 to a version that resolves this vulnerability.

    Fixed in 2.4.38-3+deb10u8Fixed in 2.4.38-3+deb10u10Fixed in 2.4.56-1~deb11u2Fixed in 2.4.56-1~deb11u1Fixed in 2.4.57-2Fixed in 2.4.57-3Fixed in 2.4.58-1
  8. Upgrade

    Upgrade Apple macOS to a version that resolves this vulnerability.

    Fixed in 11.6.6
  9. Upgrade

    Upgrade macOS to a version that resolves this vulnerability.

    Fixed in 12.4
  10. Upgrade

    Upgrade redhat/httpd to a version that resolves this vulnerability.

    Fixed in 2.4.52
  11. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 12.4
  12. Upgrade

    Upgrade apache/httpd to a version that resolves this vulnerability.

    Fixed in 2.4.53
  13. Configuration

    Disable mod_lua and restart httpd to mitigate the flaw.

    Apache HTTP Server mod_lua mod_lua = disabled

Event History

Dec 20, 2021
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionWeakness
Dec 21, 2021
Data Sourced
via Red Hat·04:53 PM
DescriptionSeverityAffected Software
May 16, 2022
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Dec 5, 2023
Exploit Published
via GitHub·05:54 AM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2021-44790?

CVE-2021-44790 is a vulnerability in Apache HTTP Server that allows a carefully crafted request body to cause a buffer overflow in the mod_lua multipart parser.

2

What software is affected by CVE-2021-44790?

Apache HTTP Server 2.4.51 and earlier versions are affected by CVE-2021-44790.

3

How severe is CVE-2021-44790?

CVE-2021-44790 has a severity level of critical.

4

How can I fix CVE-2021-44790?

To fix CVE-2021-44790, update Apache HTTP Server to version 2.4.53 or later.

5

Is there an exploit for CVE-2021-44790?

The Apache httpd team is not aware of an exploit for CVE-2021-44790, but it might be possible to craft one.

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