# What is CVE-2011-1344?

> CVE-2011-1344 is a medium-severity flaw (CVSS 6.8) in Safari from Apple, published on 10 March 2011. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 5.9%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.edgeprotect.io/what-is/cve-2011-1344

## At a glance

- **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle.
- **EdgeProtect risk score:** 25 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 6.8 out of 10)
- **Known to be exploited:** No, not on the list of flaws known to be exploited today
- **Chance of use in the next 30 days:** 5.9% (latest exploit-likelihood forecast)
- **Published:** 10 March 2011
- **Record last updated:** 11 April 2025
- **Main product:** Safari from Apple
- **Affected products:** 5

## What is CVE-2011-1344? In plain terms

It can be attacked from anywhere on the internet without logging in. If it works, the attacker can read some data, change some data and slow it down.

### The official description

Use-after-free vulnerability in WebKit, as used in Apple Safari before 5.0.5; iOS before 4.3.2 for iPhone, iPod, and iPad; iOS before 4.2.7 for iPhone 4 (CDMA); and possibly other products allows remote attackers to execute arbitrary code by adding children to a WBR tag and then removing the tag, related to text nodes, as demonstrated by Chaouki Bekrar during a Pwn2Own competition at CanSecWest 2011.

### What kind of flaw is it?

- Unknown: Unknown

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Some conditions needed
- Login needed first: No login needed
- What an attacker gets: Can read some data, change some data and slow it down

Severity vector: `AV:N/AC:M/Au:N/C:P/I:P/A:P`

## Is CVE-2011-1344 being exploited? Not that we know of

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 5.9%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 5.9%, 5.9%, 5.9%, 5.9%, 5.9%, 5.9%, 5.9%.

### Timeline

- 10 March 2011: Published
- 11 April 2025: Record last updated

### How EdgeProtect ranks it

CVE-2011-1344 scores **25 out of 100 (Low)**, with the action "Monitor".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: key context
- Real threat activity around it: key context

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2011-1344?

The published record lists 5 products.

- [Safari](https://www.edgeprotect.io/product/apple/safari) by [Apple](https://www.edgeprotect.io/vendors/apple) (Application): up to 5.0.4
- [iOS](https://www.edgeprotect.io/product/apple/iphone_os) by [Apple](https://www.edgeprotect.io/vendors/apple) (Operating system): all versions, up to 4.3.1, up to 4.2.5
- [Ipad](https://www.edgeprotect.io/product/apple/ipad) by [Apple](https://www.edgeprotect.io/vendors/apple) (Hardware): all versions
- [Iphone](https://www.edgeprotect.io/product/apple/iphone) by [Apple](https://www.edgeprotect.io/vendors/apple) (Hardware): 4
- [Ipod Touch](https://www.edgeprotect.io/product/apple/ipod_touch) by [Apple](https://www.edgeprotect.io/vendors/apple) (Hardware): all versions

## How do I fix CVE-2011-1344?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? EdgeProtect can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the latest update from the vendor. The references list where the vendor has published details.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

### References

- [dvlabs.tippingpoint.com](http://dvlabs.tippingpoint.com/blog/2011/02/02/pwn2own-2011)
- [lists.apple.com](http://lists.apple.com/archives/security-announce/2011//Apr/msg00000.html)
- [lists.apple.com](http://lists.apple.com/archives/security-announce/2011//Apr/msg00001.html)
- [lists.apple.com](http://lists.apple.com/archives/security-announce/2011//Apr/msg00002.html)
- [secunia.com](http://secunia.com/advisories/44151)
- [secunia.com](http://secunia.com/advisories/44154)
- [support.apple.com](http://support.apple.com/kb/HT4596)
- [support.apple.com](http://support.apple.com/kb/HT4607)
- [twitter.com](http://twitter.com/aaronportnoy/statuses/45632544967901187)
- [computerworld.com](http://www.computerworld.com/s/article/9214002/Safari_IE_hacked_first_at_Pwn2Own)
- [securityfocus.com](http://www.securityfocus.com/archive/1/517505/100/0/threaded)
- [securityfocus.com](http://www.securityfocus.com/archive/1/517517/100/0/threaded)
- [securityfocus.com](http://www.securityfocus.com/bid/46822)
- [securitytracker.com](http://www.securitytracker.com/id?1025363)
- [vupen.com](http://www.vupen.com/english/advisories/2011/0984)
- [zdnet.com](http://www.zdnet.com/blog/security/safarimacbook-first-to-fall-at-pwn2own-2011/8358)
- [zerodayinitiative.com](http://www.zerodayinitiative.com/advisories/ZDI-11-135)
- [exchange.xforce.ibmcloud.com](https://exchange.xforce.ibmcloud.com/vulnerabilities/66061)

## Questions

### What is CVE-2011-1344?

CVE-2011-1344 is a medium-severity flaw in Safari from Apple, published on 10 March 2011. It can be attacked from anywhere on the internet without logging in. If it works, the attacker can read some data, change some data and slow it down.

### How serious is CVE-2011-1344?

It scores 6.8 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2011-1344 is 25 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2011-1344 being exploited?

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 5.9%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2011-1344 affect?

For Safari from Apple: up to 5.0.4. The record lists 5 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2011-1344?

Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2011-1344 affect you?

EdgeProtect keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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