A VMSF_DELTA memory corruption was discovered in unrar before 5.5.5, as used in Sophos Anti-Virus Threat Detection Engine before 3.37.2 and other products, that can lead to arbitrary code execution. An integer overflow can be caused in DataSize+CurChannel. The result is a negative value of the “DestPos” variable, which allows the attacker to write out of bounds when setting Mem[DestPos].
securitytracker.com/id?1027725
telussecuritylabs.com/threats/show/TSL20121207-01
bugs.chromium.org/p/project-zero/issues/detail?id=1286
community.sophos.com/kb/en-us/118424#six
kc.mcafee.com/corporate/index?page=content&id=SB10205
lock.cmpxchg8b.com/sophailv2.pdf
nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/
security.gentoo.org/glsa/201708-05
security.gentoo.org/glsa/201709-24
security.gentoo.org/glsa/201804-16