Buffer overflow in faad2 (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU33386

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 - Memory corruption

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.

Vulnerable software versions

faad2 (Alpine package): 2.7-r7 - 2.8.8-r0

CPE2.3

• cpe:2.3:o:alpine:faad2_alpine_package:2.7-r7:*:*:*:*:alpine_linux:*:3.6
• cpe:2.3:o:alpine:faad2_alpine_package:2.7-r8:*:*:*:*:alpine_linux:*:3.9
• cpe:2.3:o:alpine:faad2_alpine_package:2.8.8-r0:*:*:*:*:alpine_linux:*:3.9

External links

https://git.alpinelinux.org/aports/commit/?id=345e3811719177be2d2edbf507a394cf92cfccb6
https://git.alpinelinux.org/aports/commit/?id=3a9fa508128d243abee97ef41bd84a7847515f61
https://git.alpinelinux.org/aports/commit/?id=e84bc7cecdbbd1563791416fd42384b047dc8c52
https://git.alpinelinux.org/aports/commit/?id=fc0275095ee7d946a66d1f1e4713a943ccc05b78
https://git.alpinelinux.org/aports/commit/?id=3f110aff54a0ff10332ae53c70a0fdc4fbd9f4ec

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.