SB2017021516 - Multiple vulnerabilities in Libav

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2016-7477)

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (invalid memory access and crash) via a crafted mp3 file.

2) Division by zero (CVE-ID: CVE-2016-7499)

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

The vulnerability exists due to divide-by-zero error within The sbr_make_f_master function in aacsbr.c in Libav 11.7. A remote attacker can perform a denial of service (divide-by-zero error and application crash) via a crafted mp3 file.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• http://www.openwall.com/lists/oss-security/2016/09/21/6
• http://www.securityfocus.com/bid/93042
• https://blogs.gentoo.org/ago/2016/09/20/libav-null-pointer-dereference-in-ff_put_pixels8_xy2_mmx-rnd_template-c/
• http://www.openwall.com/lists/oss-security/2016/09/21/9
• http://www.securityfocus.com/bid/93102
• https://blogs.gentoo.org/ago/2016/09/21/libav-divide-by-zero-in-sbr_make_f_master-aacsbr-c/
• https://git.libav.org/?p=libav.git;a=blobdiff;f=libavcodec/aacsbr.c;h=7d156e525b40b197c38db17acf16730845b91e56;hp=dbfb1677813ce6c531e4362d0be7ccf9fdfdd28e;hb=a50a5ff29ec5a8243499769e2bb9b5509ce9fd52;hpb=f55e3ff5891daf3d538b4d9176371960200d68fa