FreeType 是免費、高品質的可攜式字型引擎，可開啟及管理字型檔。它也可以有效載入、提示及轉譯個別字符。

在 FreeType 處置 TrueType 字型 (TTF)、字符點陣圖分散格式 (BDF)、Windows .fnt 和 .fon、以及 PostScript Type 1 字型的方式中發現多個瑕疵。如果使用 FreeType 連結的應用程式載入了特製的字型檔案，可導致應用程式損毀，或可能利用執行應用程式之使用者的權限來執行任意程式碼。(CVE-2012-1134、CVE-2012-1136、CVE-2012-1142、CVE-2012-1144)

在 FreeType 處理多種格式之字型的方式中發現多個瑕疵。當連結 FreeType 的應用程式載入特製的字型檔案時，可導致該應用程式發生損毀。
(CVE-2012-1126、CVE-2012-1127、CVE-2012-1130、CVE-2012-1131、CVE-2012-1132、CVE-2012-1137、CVE-2012-1139、CVE-2012-1140、CVE-2012-1141、CVE-2012-1143)

建議使用者升級至這些更新版套件，其中包含可更正這些問題的反向移植修補程式。必須重新啟動 (登出，接著重新登入) X 伺服器，此更新才能生效。

The Freetype project reports :

Multiple vulnerabilities exist in freetype that can result in application crashes and remote code execution. Please review the details in each of the CVEs for additional information.

Specially crafted font files could have caused buffer overflows in freetype. This has been fixed.

The Mozilla Project reports :

MFSA 2012-20 Miscellaneous memory safety hazards (rv:12.0/ rv:10.0.4)

MFSA 2012-21 Multiple security flaws fixed in FreeType v2.4.9

MFSA 2012-22 use-after-free in IDBKeyRange

MFSA 2012-23 Invalid frees causes heap corruption in gfxImageSurface

MFSA 2012-24 Potential XSS via multibyte content processing errors

MFSA 2012-25 Potential memory corruption during font rendering using cairo-dwrite

MFSA 2012-26 WebGL.drawElements may read illegal video memory due to FindMaxUshortElement error

MFSA 2012-27 Page load short-circuit can lead to XSS

MFSA 2012-28 Ambiguous IPv6 in Origin headers may bypass webserver access restrictions

MFSA 2012-29 Potential XSS through ISO-2022-KR/ISO-2022-CN decoding issues

MFSA 2012-30 Crash with WebGL content using textImage2D

MFSA 2012-31 Off-by-one error in OpenType Sanitizer

MFSA 2012-32 HTTP Redirections and remote content can be read by JavaScript errors

MFSA 2012-33 Potential site identity spoofing when loading RSS and Atom feeds

FreeType is a free, high-quality, portable font engine that can open and manage font files. It also loads, hints, and renders individual glyphs efficiently.

Multiple flaws were found in the way FreeType handled TrueType Font (TTF), Glyph Bitmap Distribution Format (BDF), Windows .fnt and .fon, and PostScript Type 1 fonts. If a specially crafted font file was loaded by an application linked against FreeType, it could cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2012-1134, CVE-2012-1136, CVE-2012-1142, CVE-2012-1144)

Multiple flaws were found in the way FreeType handled fonts in various formats. If a specially crafted font file was loaded by an application linked against FreeType, it could cause the application to crash.
(CVE-2012-1126, CVE-2012-1127, CVE-2012-1130, CVE-2012-1131, CVE-2012-1132, CVE-2012-1137, CVE-2012-1139, CVE-2012-1140, CVE-2012-1141, CVE-2012-1143)

Users are advised to upgrade to these updated packages, which contain a backported patch to correct these issues. The X server must be restarted (log out, then log back in) for this update to take effect.

Specially crafted font files could cause buffer overflows in freetype

According to its banner, the remote Apple iOS device is missing a security update.  Versions of Apple iOS prior to 6.0 are exposed to the following vulnerabilities :

  - Numerous memory errors exist related to handling 'TIFF', 'PNG' and 'JPEG' images and 'ImageIO' that can allow arbitrary code execution. (CVE-2011-1167, CVE-2011-3026, CVE-2011-3048, CVE-2011-3328, CVE-2012-1173, CVE-2012-3726)

  - Several issues exist related to 'CoreGraphics' and 'FreeType' (CVE-2012-1126, CVE-2012-1127, CVE-2012-1128, CVE-2012-1129, CVE-2012-1130, CVE-2012-1131, CVE-2012-1132, CVE-2012-1133, CVE-2012-1134, CVE-2012-1135, CVE-2012-1136, CVE-2012-1137, CVE-2012-1138, CVE-2012-1139, CVE-2012-1140, CVE-2012-1141, CVE-2012-1142, CVE-2012-1143, CVE-2012-1144)

  - Numerous issues exist related to libxml and can lead to application crashes or arbitrary code execution. (CVE-2011-1944, CVE-2011-2821, CVE-2011-2834, CVE-2011-3919)

  - A stack-based buffer overflow exists related to 'locale ID' and 'International Components for Unicode' (ICU). (CVE-2011-4599)

  - An unitialized memory access issue exists related to 'Sorenson' encoded movie files and 'CoreMedia'. (CVE-2012-3722)

  - An URL handling issue exists related to 'CFNetwork' that can disclose sensitive information. (CVE-2012-3724)

  - The 'DNAv4' protocol discloses sensitive information when connecting to unencrypted Wi-Fi networks. (CVE-2012-3725)

  - A buffer overflow error exists related to 'IPSec' and 'racoon' configuration files. (CVE-2012-3727)

  - An invalid pointer dereference error exists related to the kernel and packet filter ioctls. (CVE-2012-3728)

  - An uninitialized memory access error exists related to the kernel and the Berkeley Packet Filter interpreter. (CVE-2012-3729)

  - Several issues exist related to 'Mail' and the handling of attachments and 'S/MIME' signed messages. (CVE-2012-3730, CVE-2012-3731, CVE-2012-3732)

  - Information disclosure issues exist related to 'Messages', 'Office Viewer', system logs, and 'UIKit'. (CVE-2012-3733, CVE-2012-3734, CVE-2012-3743, CVE-2012-3746)

  - Memory corruption errors exist related to 'OpenGL'. (CVE-2011-3457)

  - Numerous errors exist related to 'Passcode Lock'. (CVE-2012-3735, CVE-2012-3736, CVE-2012-3737, CVE-2012-3738, CVE-2012-3739, CVE-2012-3740)

  - An error exists in 'Restrictions' that can allow unauthorized purchases. (CVE-2012-3741)

  - Errors exist in 'Safari' that are related to misleading URL characters and password auto complete. (CVE-2012-3742, CVE-2012-0680)

  - A buffer overflow error exists related to 'Telephony' and SMS handling. (CVE-2012-3745)

  - Many errors exist related to the bundled 'WebKit' components. (CVE-2011-2845, CVE-2011-3016, CVE-2011-3021, CVE-2011-3027, CVE-2011-3032, CVE-2011-3034, CVE-2011-3035, CVE-2011-3036, CVE-2011-3037, CVE-2011-3038, CVE-2011-3039, CVE-2011-3040, CVE-2011-3041, CVE-2011-3042, CVE-2011-3043, CVE-2011-3044, CVE-2011-3050, CVE-2011-3053, CVE-2011-3059, CVE-2011-3060, CVE-2011-3064, CVE-2011-3067, CVE-2011-3068, CVE-2011-3069, CVE-2011-3071, CVE-2011-3073, CVE-2011-3074, CVE-2011-3075, CVE-2011-3076, CVE-2011-3078, CVE-2011-3081, CVE-2011-3086, CVE-2011-3089, CVE-2011-3090, CVE-2011-3105, CVE-2011-3913, CVE-2011-3924, CVE-2011-3926, CVE-2011-3958, CVE-2011-3966, CVE-2011-3968, CVE-2011-3969, CVE-2011-3971, CVE-2012-0682, CVE-2012-0683, CVE-2012-1520, CVE-2012-1521, CVE-2012-2815, CVE-2012-2818, CVE-2012-3589, CVE-2012-3590, CVE-2012-3591, CVE-2012-3592, CVE-2012-3593, CVE-2012-3594, CVE-2012-3595, CVE-2012-3596, CVE-2012-3597, CVE-2012-3598, CVE-2012-3599, CVE-2012-3600, CVE-2012-3601, CVE-2012-3602, CVE-2012-3603, CVE-2012-3604, CVE-2012-3605, CVE-2012-3608, CVE-2012-3609, CVE-2012-3610, CVE-2012-3611, CVE-2012-3612, CVE-2012-3613, CVE-2012-3614, CVE-2012-3615, CVE-2012-3617, CVE-2012-3618, CVE-2012-3620, CVE-2012-3624, CVE-2012-3625, CVE-2012-3626, CVE-2012-3627, CVE-2012-3628, CVE-2012-3629, CVE-2012-3630, CVE-2012-3631, CVE-2012-3633, CVE-2012-3634, CVE-2012-3635, CVE-2012-3636, CVE-2012-3637, CVE-2012-3638, CVE-2012-3639, CVE-2012-3640, CVE-2012-3641, CVE-2012-3642, CVE-2012-3644, CVE-2012-3645, CVE-2012-3646, CVE-2012-3647, CVE-2012-3648, CVE-2012-3650, CVE-2012-3651, CVE-2012-3652, CVE-2012-3653, CVE-2012-3655, CVE-2012-3656, CVE-2012-3658, CVE-2012-3659, CVE-2012-3660, CVE-2012-3661, CVE-2012-3663, CVE-2012-3664, CVE-2012-3665, CVE-2012-3666, CVE-2012-3667, CVE-2012-3668, CVE-2012-3669, CVE-2012-3670, CVE-2012-3671, CVE-2012-3672, CVE-2012-3673, CVE-2012-3674, CVE-2012-3676, CVE-2012-3677, CVE-2012-3678, CVE-2012-3679, CVE-2012-3680, CVE-2012-3681, CVE-2012-3682, CVE-2012-3683, CVE-2012-3684, CVE-2012-3686, CVE-2012-3691, CVE-2012-3693, CVE-2012-3695, CVE-2012-3696, CVE-2012-3703, CVE-2012-3704, CVE-2012-3706, CVE-2012-3708, CVE-2012-3710, CVE-2012-3747)

ID	名前	製品	ファミリー	公開日	更新日	深刻度
61295	Scientific Linux 安全性更新：SL5.x、SL6.x i386/x86_64 上的 freetype	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	critical
58641	FreeBSD : freetype -- multiple vulnerabilities (462e2d6c-8017-11e1-a571-bcaec565249c)	Nessus	FreeBSD Local Security Checks	2012/4/9	2021/1/6	critical
58722	SuSE 10 Security Update : freetype2 (ZYPP Patch Number 8039)	Nessus	SuSE Local Security Checks	2012/4/12	2021/1/19	critical
58864	FreeBSD : mozilla -- multiple vulnerabilities (380e8c56-8e32-11e1-9580-4061862b8c22)	Nessus	FreeBSD Local Security Checks	2012/4/25	2021/1/6	critical
61295	Scientific Linux Security Update : freetype on SL5.x, SL6.x i386/x86_64 (20120410)	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	critical
74597	openSUSE Security Update : freetype2 (openSUSE-SU-2012:0489-1)	Nessus	SuSE Local Security Checks	2014/6/13	2021/1/19	critical
6589	Apple iOS < 6.0 Multiple Vulnerabilities	Nessus Network Monitor	Mobile Devices	2012/9/24	2019/3/6	high

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