Apple released iOS 7.1.2 on Monday, a maintenance release that fixes three specified issues: an issue with Apple's iBeacon technology, an issue with data transfer with bar code scanners, and an issue with attachments in Mail.app.
Apple's patch notes in full:
This update contains bug fixes and security updates, including:
- Improves iBeacon connectivity and stability
- Fixes a bug with data transfer for some 3rd party accessories, including bar code scanners
- Corrects an issue with data protection class of Mail attachments
For information on the security content of this update, please visit this website: http://support.apple.com/kb/HT1222
This release hasn't yet been added to the security site linked above.
The update is a 1.44GB download through iTunes for iPhone 5s. The over-the-air update is a comparatively svelte 32.3MB on iPhone.
The OTA update for iPad Air is 28.8MB. iPad mini (non-Retina Display) was 22.4MB.