#VU66435 Out-of-bounds write in libsolv - CVE-2021-33930

Vulnerability identifier: #VU66435

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-33930

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libsolv
Universal components / Libraries / Libraries used by multiple products

Vendor: SUSE

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when processing untrusted input within the pool_installable_whatprovides(0 function in src/repo.h. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger an out-of-bounds write and crash the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libsolv: 0.7.0 - 0.7.16

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External links
https://github.com/openSUSE/libsolv/issues/417

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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.