View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2011-0723 medium priority: Ubuntu including 2 source packages (ffmpeg, libav), 12 status rows across 6 suites (dapper, hardy, karmic, lucid, maverick, upstream): DNE 5, released 4, needs-triage 2, ignored 1.
FFmpeg 0.5.x, as used in MPlayer and other products, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a malformed VC-1 file.