Libass
Monthly
Denial of service in libass 0.17.5: rendering a crafted ASS/SSA subtitle drives 32-bit integer overflow in ass_outline_construct() and the surrounding bbox, pen-advance and shear arithmetic in libass/ass_render.c, causing the hosting application to crash or abort. Per the CVSS vector (AV:N/AC:L/PR:N/UI:N) the issue is remotely reachable without authentication, but the attacker must first get a malicious subtitle parsed and rendered - as an embedded or sidecar track in a media file, or an auto-processed subtitle in a server-side pipeline - and the effect is limited to availability with no confidentiality or integrity impact. A public PoC reference exists (a gist is linked from the CVE record); it is not verified as working exploit code, EPSS is low at 0.26% (17th percentile), there is no CISA KEV listing, and the priority signal is this_week rather than emergency.
In libass 0.14.0, the `ass_outline_construct`'s call to `outline_stroke` causes a signed integer overflow. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Buffer overflow in the calc_coeff function in libass/ass_blur.c in libass before 0.13.4 allows remote attackers to cause a denial of service via unspecified vectors. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
The wrap_lines_smart function in ass_render.c in libass before 0.13.4 allows remote attackers to cause a denial of service (out-of-bounds read) via unspecified vectors, related to "0/3 line wrapping. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Denial of service in libass 0.17.5: rendering a crafted ASS/SSA subtitle drives 32-bit integer overflow in ass_outline_construct() and the surrounding bbox, pen-advance and shear arithmetic in libass/ass_render.c, causing the hosting application to crash or abort. Per the CVSS vector (AV:N/AC:L/PR:N/UI:N) the issue is remotely reachable without authentication, but the attacker must first get a malicious subtitle parsed and rendered - as an embedded or sidecar track in a media file, or an auto-processed subtitle in a server-side pipeline - and the effect is limited to availability with no confidentiality or integrity impact. A public PoC reference exists (a gist is linked from the CVE record); it is not verified as working exploit code, EPSS is low at 0.26% (17th percentile), there is no CISA KEV listing, and the priority signal is this_week rather than emergency.
In libass 0.14.0, the `ass_outline_construct`'s call to `outline_stroke` causes a signed integer overflow. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Buffer overflow in the calc_coeff function in libass/ass_blur.c in libass before 0.13.4 allows remote attackers to cause a denial of service via unspecified vectors. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
The wrap_lines_smart function in ass_render.c in libass before 0.13.4 allows remote attackers to cause a denial of service (out-of-bounds read) via unspecified vectors, related to "0/3 line wrapping. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.