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amazonAmazonALAS-2012-052
HistoryMar 04, 2012 - 4:12 p.m.

Medium: libxml2

2012-03-0416:12:00
alas.aws.amazon.com
21

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

AI Score

8.4

Confidence

High

EPSS

0.009

Percentile

82.9%

Issue Overview:

It was found that the hashing routine used by libxml2 arrays was susceptible to predictable hash collisions. Sending a specially-crafted message to an XML service could result in longer processing time, which could lead to a denial of service. To mitigate this issue, randomization has been added to the hashing function to reduce the chance of an attacker successfully causing intentional collisions. (CVE-2012-0841)

Affected Packages:

libxml2

Issue Correction:
Run yum update libxml2 to update your system.

New Packages:

i686:  
    libxml2-python-2.7.6-4.12.amzn1.i686  
    libxml2-debuginfo-2.7.6-4.12.amzn1.i686  
    libxml2-devel-2.7.6-4.12.amzn1.i686  
    libxml2-2.7.6-4.12.amzn1.i686  
    libxml2-static-2.7.6-4.12.amzn1.i686  
  
src:  
    libxml2-2.7.6-4.12.amzn1.src  
  
x86_64:  
    libxml2-devel-2.7.6-4.12.amzn1.x86_64  
    libxml2-2.7.6-4.12.amzn1.x86_64  
    libxml2-python-2.7.6-4.12.amzn1.x86_64  
    libxml2-debuginfo-2.7.6-4.12.amzn1.x86_64  
    libxml2-static-2.7.6-4.12.amzn1.x86_64  

Additional References

Red Hat: CVE-2012-0841

Mitre: CVE-2012-0841

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

AI Score

8.4

Confidence

High

EPSS

0.009

Percentile

82.9%