critical
9.8
CWE
787
Advisory Published
CVE Published
CVE Published
Updated

CVE-2022-28734: Out-of-bounds write when handling split HTTP headers

First published: Wed May 25 2022(Updated: )

Out-of-bounds write when handling split HTTP headers; When handling split HTTP headers, GRUB2 HTTP code accidentally moves its internal data buffer point by one position. This can lead to a out-of-bound write further when parsing the HTTP request, writing a NULL byte past the buffer. It's conceivable that an attacker controlled set of packets can lead to corruption of the GRUB2's internal memory metadata.

Credit: security@ubuntu.com security@ubuntu.com security@ubuntu.com

Affected SoftwareAffected VersionHow to fix
ubuntu/grub2<2.06-3
2.06-3
debian/grub2
2.06-3~deb10u1
2.06-3~deb10u3
2.06-3~deb11u5
2.06-3~deb11u4
2.06-13
2.12~rc1-9
redhat/grub2<1:2.02-123.el8_6.8
1:2.02-123.el8_6.8
redhat/grub2<1:2.02-87.el8_1.10
1:2.02-87.el8_1.10
redhat/grub2<1:2.02-87.el8_2.10
1:2.02-87.el8_2.10
redhat/grub2<1:2.02-99.el8_4.9
1:2.02-99.el8_4.9
redhat/grub2<1:2.06-27.el9_0.7
1:2.06-27.el9_0.7
Gnu Grub2>=2.00<2.06-3
redhat/grub<2.12
2.12
gnu Grub2>=2.00<2.06-3
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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2022-28734?

    CVE-2022-28734 is a vulnerability in grub2 that allows an attacker to perform an out-of-bounds write due to an issue handling split HTTP headers.

  • What is the severity of CVE-2022-28734?

    CVE-2022-28734 has a severity rating of 9.8 (Critical).

  • Which software is affected by CVE-2022-28734?

    CVE-2022-28734 affects the following software versions: Red Hat grub2 1:2.02-123.el8_6.8, Red Hat grub2 1:2.02-87.el8_1.10, Red Hat grub2 1:2.02-87.el8_2.10, Red Hat grub2 1:2.02-99.el8_4.9, Red Hat grub2 1:2.06-27.el9_0.7, Red Hat grub 2.12, Gnu Grub2 2.00 to 2.06-3, Ubuntu grub2 2.06-3, Debian grub2 2.06-3~deb10u1, 2.06-3~deb10u3, 2.06-3~deb11u5, 2.06-3~deb11u4, 2.06-13, and 2.12~rc1-9.

  • How can an attacker exploit CVE-2022-28734?

    An attacker can exploit CVE-2022-28734 by crafting a malicious request containing split HTTP headers that trigger an out-of-bounds write in grub2, potentially leading to remote code execution or denial of service.

  • How can I fix CVE-2022-28734?

    To fix CVE-2022-28734, it is recommended to update the affected software versions to the specified remedies: Red Hat grub2 1:2.02-123.el8_6.8, Red Hat grub2 1:2.02-87.el8_1.10, Red Hat grub2 1:2.02-87.el8_2.10, Red Hat grub2 1:2.02-99.el8_4.9, Red Hat grub2 1:2.06-27.el9_0.7, Red Hat grub 2.12, Gnu Grub2 2.06-3, Ubuntu grub2 2.06-3, Debian grub2 2.06-3~deb10u1, 2.06-3~deb10u3, 2.06-3~deb11u5, 2.06-3~deb11u4, 2.06-13, and 2.12~rc1-9.

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