Amazon Linux AMI update for git



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-21300
CWE-ID CWE-94
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Code Injection

EUVDB-ID: #VU51337

Risk: High

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2021-21300

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in Git for Visual Studio. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages:

i686:
    git-core-2.18.5-2.73.amzn1.i686
    git-instaweb-2.18.5-2.73.amzn1.i686
    git-debuginfo-2.18.5-2.73.amzn1.i686
    git-subtree-2.18.5-2.73.amzn1.i686
    git-daemon-2.18.5-2.73.amzn1.i686
    git-svn-2.18.5-2.73.amzn1.i686
    git-2.18.5-2.73.amzn1.i686

noarch:
    perl-Git-2.18.5-2.73.amzn1.noarch
    git-p4-2.18.5-2.73.amzn1.noarch
    perl-Git-SVN-2.18.5-2.73.amzn1.noarch
    git-cvs-2.18.5-2.73.amzn1.noarch
    git-email-2.18.5-2.73.amzn1.noarch
    git-hg-2.18.5-2.73.amzn1.noarch
    emacs-git-el-2.18.5-2.73.amzn1.noarch
    gitweb-2.18.5-2.73.amzn1.noarch
    git-bzr-2.18.5-2.73.amzn1.noarch
    git-all-2.18.5-2.73.amzn1.noarch
    emacs-git-2.18.5-2.73.amzn1.noarch
    git-core-doc-2.18.5-2.73.amzn1.noarch

src:
    git-2.18.5-2.73.amzn1.src

x86_64:
    git-subtree-2.18.5-2.73.amzn1.x86_64
    git-2.18.5-2.73.amzn1.x86_64
    git-core-2.18.5-2.73.amzn1.x86_64
    git-debuginfo-2.18.5-2.73.amzn1.x86_64
    git-daemon-2.18.5-2.73.amzn1.x86_64
    git-svn-2.18.5-2.73.amzn1.x86_64
    git-instaweb-2.18.5-2.73.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2021-1490.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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