Stack-based Buffer Overflow Affecting grub2-s390x-emu package, versions <2.04-9.34.1
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Test your applications- Snyk ID SNYK-SLES152-GRUB2S390XEMU-2685842
- published 14 Apr 2022
- disclosed 2 Mar 2021
Introduced: 2 Mar 2021
CVE-2020-27749 Open this link in a new tabHow to fix?
Upgrade SLES:15.2
grub2-s390x-emu
to version 2.04-9.34.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream grub2-s390x-emu
package and not the grub2-s390x-emu
package as distributed by SLES
.
See How to fix?
for SLES:15.2
relevant fixed versions and status.
A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
References
- https://www.suse.com/security/cve/CVE-2020-27749.html
- https://lists.suse.com/pipermail/sle-security-updates/2021-March/008423.html
- https://www.suse.com/support/update/announcement/2021/suse-su-20210683-1/
- https://bugzilla.suse.com/1175970
- https://bugzilla.suse.com/1176711
- https://bugzilla.suse.com/1177883
- https://bugzilla.suse.com/1179264
- https://bugzilla.suse.com/1179265
- https://bugzilla.suse.com/1182057
- https://bugzilla.suse.com/1182262
- https://bugzilla.suse.com/1182263
- https://bugzilla.suse.com/1192833
- https://www.suse.com/security/cve/CVE-2020-14372/
- https://www.suse.com/security/cve/CVE-2020-25632/
- https://www.suse.com/security/cve/CVE-2020-25647/
- https://www.suse.com/security/cve/CVE-2020-27749/
- https://www.suse.com/security/cve/CVE-2020-27779/
- https://www.suse.com/security/cve/CVE-2021-20225/
- https://www.suse.com/security/cve/CVE-2021-20233/
- https://www.suse.com/support/security/rating/
- https://bugzilla.redhat.com/show_bug.cgi?id=1899966
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
- https://security.gentoo.org/glsa/202104-05
- https://security.netapp.com/advisory/ntap-20220325-0001/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/