FreeType 是免费的高质量可移植字体引擎，能够打开和管理字体文件。它还能够高效地加载、提示和渲染单个字形。

已在 FreeType 处理 TrueType 字体 (TTF)、字形位图分发格式 (BDF)、Windows .fnt 和 .fon 以及 PostScript Type 1 字体的方式中发现多种缺陷。如果链接到 FreeType 的应用程序加载了特别构建的字体文件，则可能导致应用程序崩溃或可能以运行该应用程序的用户的权限执行任意代码。（CVE-2012-1134、CVE-2012-1136、CVE-2012-1142、CVE-2012-1144）

在 FreeType 处理多种格式字体的方式中发现多个缺陷。如果通过链接到 FreeType 的应用程序加载了特别构建的字体文件，则其可导致该应用程序崩溃。
（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）

建议用户升级这些更新后的程序包，其中包含用于修正这些问题的向后移植的修补程序。必须重新启动（注销，然后重新登录）X 服务器才能使此更新生效。

Mozilla 项目报告：

MFSA 2012-20 - 多项内存安全危害 (rv:12.0/ rv:10.0.4)

MFSA 2012-21 在 FreeType v2.4.9 中修复了多种安全缺陷

MFSA 2012-22 IDBKeyRange 中的释放后使用

MFSA 2012-23 无效的释放导致 gfxImageSurface 中的堆损坏

MFSA 2012-24 通过多字节内容处理错误造成的潜在 XSS

MFSA 2012-25 使用 cairo-dwrite 进行字体渲染期间的潜在内存损坏

MFSA 2012-26 WebGL.drawElements 可因 FindMaxUshortElement 错误而读取非法视频内存

MFSA 2012-27 页面加载短路可导致 XSS

MFSA 2012-28 原始标头中有歧义的 IPv6 可绕过 webserver 访问限制

MFSA 2012-29 因 ISO-2022-KR/ISO-2022-CN 解码问题而存在的潜在 XSS

MFSA 2012-30 使用 textImage2D 的 WebGL 内容发生的崩溃

MFSA 2012-31 OpenType 审查器中的差一错误

MFSA 2012-32 HTTP 重定向和远程内容可由 JavaScript 错误读取

MFSA 2012-33 加载 RSS 和 Atom 源时的潜在站点身份欺骗

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	Name	Product	Family	Published	Updated	Severity
61295	Scientific Linux 安全更新：SL5.x、SL6.x i386/x86_64 中的 freetype	Nessus	Scientific Linux Local Security Checks	8/1/2012	1/14/2021	critical
58864	FreeBSD：mozilla -- 多种漏洞 (380e8c56-8e32-11e1-9580-4061862b8c22)	Nessus	FreeBSD Local Security Checks	4/25/2012	1/6/2021	critical
6589	Apple iOS < 6.0 Multiple Vulnerabilities	Nessus Network Monitor	Mobile Devices	9/24/2012	3/6/2019	high

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high