#VU33386 Buffer overflow - CVE-2019-15296

Vulnerability identifier: #VU33386

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-15296

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to execute arbitrary code.

An issue was discovered in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. The faad_resetbits function in libfaad/bits.c is affected by a buffer overflow vulnerability. The number of bits to be read is determined by ld->buffer_size - words*4, cast to uint32. If ld->buffer_size - words*4 is negative, a buffer overflow is later performed via getdword_n(&ld->start[words], ld->bytes_left).

Mitigation
Install update from vendor's website.

External links
https://github.com/knik0/faad2/commit/942c3e0aee748ea6fe97cb2c1aa5893225316174
https://lists.debian.org/debian-lts-announce/2019/08/msg00033.html
https://seclists.org/bugtraq/2019/Sep/28
https://security.gentoo.org/glsa/202006-17
https://www.debian.org/security/2019/dsa-4522

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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