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amazonAmazonALAS-2014-291
HistoryFeb 26, 2014 - 2:27 p.m.

Important: libyaml

2014-02-2614:27:00
alas.aws.amazon.com
14

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.031 Low

EPSS

Percentile

90.8%

Issue Overview:

The yaml_parser_scan_tag_uri function in scanner.c in LibYAML before 0.1.5 performs an incorrect cast, which allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted tags in a YAML document, which triggers a heap-based buffer overflow.

Affected Packages:

libyaml

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

New Packages:

i686:  
    libyaml-devel-0.1.4-6.5.amzn1.i686  
    libyaml-debuginfo-0.1.4-6.5.amzn1.i686  
    libyaml-0.1.4-6.5.amzn1.i686  
  
src:  
    libyaml-0.1.4-6.5.amzn1.src  
  
x86_64:  
    libyaml-debuginfo-0.1.4-6.5.amzn1.x86_64  
    libyaml-0.1.4-6.5.amzn1.x86_64  
    libyaml-devel-0.1.4-6.5.amzn1.x86_64  

Additional References

Red Hat: CVE-2013-6393

Mitre: CVE-2013-6393

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.031 Low

EPSS

Percentile

90.8%

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